An elderly man is crying outside a national bank branch as pensioners queue to get their pensions, with a limit of 120 euros, in Thessaloniki on 3 July, 2015. Greece is almost evenly split over a crucial weekend referendum that could decide its financial fate, with a “Yes” result possibly ahead by a whisker, the latest survey Friday showed. Prime Minister Alexis Tsipras's government is asking Greece's voters to vote “No” to a technically phrased question asking if they are willing to accept more tough austerity conditions from international creditors in exchange for bailout funds. (Photo by Sakis Mitrolidis/AFP Photo)

An crying elderly man is assisted by an employee and a policeman outside a national bank branch as pensioners queue to get their pensions, with a limit of 120 euros, in Thessaloniki on 3 July, 2015. (Photo by Sakis Mitrolidis/AFP Photo)

A student of the Trapeze School New York in Coney Island, right, flies with the Wonder Wheel in the background, Friday, July 3, 2015, in the Brooklyn borough of New York. The school will be open 7 days a week until it is too cold to fly. Temperatures will be in the mid 70s and 80s for the 4th of July holiday weekend. (Photo by Mary Altaffer/AP Photo)

A Bahraini police officers stands guard outside of Shiite Muslim mosque ahead of mid-day prayers during the holy month of Ramadan in the western village of Karzakan, Bahrain, Friday, July 3, 2015. Bahraini government and religious authorities are taking extra precautions in the wake of suicide bombing attacks on Shiite mosques in neighboring Saudi Arabia and Kuwait that were claimed by the Islamic State group and killed dozens of people. (Photo by Hasan Jamali/AP Photo)

Rollie Leonberger, 50, shows where he said he found a woman in Jefferson County, Mo., Thursday, July 2, 2015. The creek had flooded and swept the woman's car off the road. Leonberger found her several hundred yards downstream. “I don't know how I heard her screaming over the noise of the flood and the rain”, said Leonberger. ”The water was up over her waist when I found her”, he said. Hillsboro firefighters rescued the woman, who had been holding on to the tree for over an hour according to the St. Louis Post-Dispatch. Next to Leonberger is a pop-up camper that is wrapped around a tree. (Photo by J. B. Forbes/St. Louis Post-Dispatch via AP Photo)

Protesters shout slogans against President Rafael Correa during an opposition march to the president's office in Quito, Ecuador, late Thursday, July 2, 2015. People turned out for protest marches across Ecuador to call for Correa's ouster just three days before a visit by Pope Francis. (Photo by Dolores Ochoa/AP Photo)

The American Eagle competes in the 39th Annual Great Schooner race, Friday, July 3, 2015, on Penobscot Bay off the coast of Rockland, Maine. The former fishing vessel was launched in 1930. The history of racing coasting schooners started over a century ago with sailors trying to beat their competitors to market, according to the Maine Windjammmer's Association. The first boat back to port always got the best price for their cargo, whether it be fish, granite or Christmas trees. (Photo by Robert F. Bukaty/AP Photo)

The Bank of American Fork piggy bank balloon crash lands near Utah Valley Regional Medical Center during America's Freedom Festival Balloon Fest on Thursday, July 2, 2015, in Provo, Utah. (Photo by Grant Hindsley/The Daily Herald via AP Photo)

The Bank of American Fork piggy bank balloon lies on the ground after crash landing near Utah Valley Regional Medical Center during America's Freedom Festival Balloon Fest on Thursday, July 2, 2015, in Provo, Utah. (Photo by Grant Hindsley/The Daily Herald via AP Photo)

A model wears a creation from “Bcn Brand” during the 080 Barcelona fashion show in Barcelona, Spain, Friday, July 3, 2015. (Photo by Manu Fernandez/AP Photo)

A model wears a creation from “Bcn Brand” during the 080 Barcelona fashion show in Barcelona, Spain, Friday, July 3, 2015. (Photo by Manu Fernandez/AP Photo)

A model wears a creation from “Bcn Brand” during the 080 Barcelona fashion show in Barcelona, Spain, Friday, July 3, 2015. (Photo by Manu Fernandez/AP Photo)

A couple from Mexico performs during the 9th International Festival Danzon in Havana, June 26, 2015. Danzon is a blend of European and African rhythms and appeared in 1879 in the Cuban province Matanzas. It was declared Intangible Cultural Heritage of Cuba in 2013 and it is the official genre and dance of Cuba. (Photo by Alexandre Meneghini/Reuters)

A flamingo, which had its leg amputated, is pictured with its new prosthesis at Sorocaba Zoo in Sorocaba, Brazil, July 1, 2015. The Chilean flamingo was given a specially-made prosthesis after a fracture in the left leg resulted in the bottom portion of the leg needing to be amputated to prevent an infection. (Photo by Paulo Whitaker/Reuters)

Spanish castellers form a human tower called a “castell” during a performance at the City God Pavilion, or Chenghuang Ge in Mandarin, a tourism resort near the West Lake, in Hangzhou, Zhejiang province, China, July 2, 2015. A total of 190 castellers from Spain took part in the performance on Thursday, local media reported. (Photo by Reuters/Stringer)

Spanish castellers form a human tower called a “castell” during a performance at the City God Pavilion, or Chenghuang Ge in Mandarin, a tourism resort near the West Lake, in Hangzhou, Zhejiang province, China, July 2, 2015. (Photo by Reuters/Stringer)

Australian Prime Minister Tony Abbott (C) exits a Seahawk helicopter as he arrives aboard the U.S. Navy's USS Blue Ridge as it enters Sydney Harbour, Australia, July 3, 2015. The ship is in Australia to participate in the joint military exercise with Australian forces named “Talisman Sabre” which begins next week. (Photo by Tim Hunter/Reuters)

Palestinians, not permitted by Israeli security forces to cross into Jerusalem from the West Bank due to an age limit, climb over a section of the controversial Israeli barrier as they try to make their way to attend the third Friday prayer of Ramadan in Jerusalem's al-Aqsa mosque, in the village of Al-Ram, near Ramallah, July 3, 2015. (Photo by Mohamad Torokman/Reuters)

An Israeli border policeman keeps guard as a Palestinian girl waits with her mother to show their permits to Israeli security officers to make their way to attend the third Friday prayer of Ramadan in Jerusalem's al-Aqsa mosque, at Qalandia checkpoint near the West Bank city of Ramallah, July 3, 2015. (Photo by Mohamad Torokman/Reuters)

Israeli border policemen detain a Palestinian during clashes between Israeli troops and Palestinians, at Qalandiya checkpoint near the West Bank city of Ramallah July 3, 2015. A senior Israeli army officer shot and killed a Palestinian youth who was throwing stones near a checkpoint in the occupied West Bank on Friday, Palestinian and Israeli sources said. (Photo by Mohamad Torokman/Reuters)

A Palestinian woman argues with an Israeli border policeman as other Palestinians wait to show their identity cards to make their way to attend the third Friday prayer of Ramadan in Jerusalem's al-Aqsa mosque, at an Israeli checkpoint in the West bank city of Bethlehem, July 3, 2015. (Photo by Mussa Qawasma/Reuters)

Israeli security officers check the identity cards of Palestinians as they make their way to attend the third Friday prayer of Ramadan in Jerusalem's al-Aqsa mosque, at an Israeli checkpoint in the West bank city of Bethlehem July 3, 2015. (Photo by Mussa Qawasma/Reuters)

Israeli security officers check the identity cards of Palestinians as they make their way to attend the third Friday prayer of Ramadan in Jerusalem's al-Aqsa mosque, at an Israeli checkpoint in the West bank city of Bethlehem July 3, 2015. (Photo by Mussa Qawasma/Reuters)

Palestinian women make their way to attend the third Friday prayer of Ramadan in Jerusalem's al-Aqsa mosque, through an Israeli checkpoint in the West bank city of Bethlehem, July 3, 2015. (Photo by Mussa Qawasma/Reuters)

A Russian Progress spacecraft blasts off from the launch pad at the Baikonur cosmodrome, Kazakhstan July 3, 2015. The unmanned version of the Russian Soyuz spacecraft known as the Progress 60P resupply vehicle lifted off from the Baikonur Cosmodrome in Kazakhstan on Friday to travel to the International Space Station (ISS), NASA said. (Photo by Reuters/Stringer)

Rescue workers pull a man trapped by a sudden rise of water level during a heavy rainfall in the Lijiang River, Guilin, Guangxi Zhuang Autonomous Region, July 2, 2015. (Photo by Reuters/Stringer)

Movistar rider Nairo Quintana of Colombia cycles during a team training session in Utrecht, Netherlands, July 3, 2015. The 2015 Tour de France cycling race will start in Utrecht, on Saturday July 4. (Photo by Benoit Tessier/Reuters)

Cars of a passenger train fall after a bridge collapse led a train into a canal in Wazirabad, near Lahore, Pakistan Friday, July 3, 2015. Pakistan's military said Friday the death toll from an accident to a special train that plunged into a canal because of a bridge collapse has risen. Divers were searching for more bodies. (Photo by Rameez Khan/AP Photo)

Pakistan army soldiers conduct a search operation after a train fell into a canal near Gujranwala, Pakistan, July 3, 2015. A train carrying hundreds of Pakistan military personnel and their families plunged into a canal on Thursday, killing 12 soldiers, when a bridge collapsed in what the army suspects was sabotage, officials said. (Photo by Reuters/Stringer)

Pakistan army soldiers hold hands in hands while conducting a search operation after a train fell into a canal near Gujranwala, Pakistan, July 3, 2015. (Photo by Reuters/Stringer)

Vehicles move past men offering their Friday prayers near a mosque during the holy month of Ramadan in Karachi, Pakistan, July 3, 2015. (Photo by Akhtar Soomro/Reuters)

Museum workers hang Paul Gaugin's “Nafea faa ipoipo” (When will you marry) on a wall at the Reina Sofia museum in Madrid, Spain, July 3, 2015. The painting, believed to be the world's most expensive painting, is on show at Madrid's Reina Sofia among other paintings coming from the Basel museum, according to media and museum sources. (Photo by Andrea Comas/Reuters)

People walk at a site hit by a Saudi-led air strike in Yemen's capital Sanaa July 3, 2015. Warplanes from a Saudi-led coalition bombed targets in the Yemeni capital on Friday, residents said, and sources in the country's dominant Houthi militia reported at least six people including a woman and child were killed. (Photo by Khaled Abdullah/Reuters)

A plaque dedicated to those killed in a recent attack by an Islamist gunman, is seen at the beach where the attack took place during a minute's silence in Sousse, Tunisia July 3, 2015. Tunisian authorities were on Thursday hunting further suspects in the Sousse hotel attack identified by officials as part of a group trained in a Libyan jihadist camp alongside gunmen who carried out a massacre at a Tunis museum. Thirty-eight foreigners, most British holidaymakers, were killed in last Friday's attack before the gunman was shot by police. (Photo by Anis Mili/Reuters)

People join hands as they observe a minute's silence in memory of those killed in a recent attack by an Islamist gunman, at a beach in Sousse, Tunisia July 3, 2015. (Photo by Anis Mili/Reuters)

Mourners carry the body of Palestinian youth Mohammed Sami al-Ksbeh, 17, during his funeral in Qalandiya refugee camp, near the West Bank city of Ramallah July 3, 2015. A senior Israeli army officer shot and killed Ksbeh who was throwing stones near a checkpoint in the occupied West Bank on Friday, Palestinian and Israeli sources said. A Palestinian witness and an Israeli military spokeswoman said the Palestinian was among a group throwing stones at an army vehicle near Qalandiya, a major checkpoint between Jerusalem and the West Bank city of Ramallah. (Photo by Mohamad Torokman/Reuters)

Palestinian militants take part in the funeral of Palestinian youth Mohammed Sami al-Ksbeh, 17, during his funeral in Qalandiya refugee camp, near the West Bank city of Ramallah July 3, 2015. (Photo by Mohamad Torokman/Reuters)

People look at a Mk.1 Spitfire, donated by American entrepreneur and philanthropist, Thomas Kaplan, on display outside the Churchill War Rooms in London, Britain July 3, 2015. The aircraft which is estimated to sell for 1.5-2.5 million pounds ($2.3-3.9 million) will be auctioned by Christie's in London on July 9. (Photo by Peter Nicholls/Reuters)

Pilot John Romain looks in the windscreen of a Mk.1 Spitfire, donated by American entrepreneur and philanthropist, Thomas Kaplan, on display outside the Churchill War Rooms in London, Britain July 3, 2015. (Photo by Peter Nicholls/Reuters)

American entrepreneur and philanthropist, Thomas Kaplan, sits in a Mk.1 Spitfire, on display outside the Churchill War Rooms in London, Britain July 3, 2015. (Photo by Peter Nicholls/Reuters)

Mercedes Formula One driver Lewis Hamilton of Britain gestures during a practice session ahead of the British Grand Prix 2015 at the Silverstone Race Circuit, Britain, July 3, 2015. (Photo by Reuters/Hoch Zwei/Action Images via Reuters Livepic)

Formula One, British Grand Prix 2015 – Silverstone, England on July 3, 2015: Mercedes Lewis Hamilton of Britain during practice. (Photo by Paul Childs/Reuters)

Palestinian girls wait ahead of prayers on the third Friday of the holy month of Ramadan at the compound known to Muslims as the Noble Sanctuary and to Jews as Temple Mount, in Jerusalem's Old City July 3, 2015. An Israeli police spokesperson said on Friday that some 150,000 people attended the prayers on the compound and Israel barred Palestinian men under 50 and women under 30 from entering Jerusalem from the West Bank without a permit. (Photo by Ammar Awad/Reuters)

Members of the far-right radical group Right Sector, representatives of the Ukrainian volunteer corps and their supporters line up as they gather to march in central Kiev, Ukraine, July 3, 2015. The participants held a rally to demand from authorities to denounce the so-called Minsk peace agreements, to declare the military conflict in eastern Ukraine a war, to equip volunteer battalions by up-to-date standards and to break off diplomatic ties with Russia, according to local media. (Photo by Valentyn Ogirenko/Reuters)

Tyres are set on fire during a rally held by members of the far-right radical group Right Sector, representatives of the Ukrainian volunteer corps and their supporters in central Kiev, Ukraine, July 3, 201. (Photo by Valentyn Ogirenko/Reuters)

A participant looks on during a rally held by members of the far-right radical group Right Sector, representatives of the Ukrainian volunteer corps and their supporters, with tyres set on fire seen in the background, in central Kiev, Ukraine, July 3, 2015. (Photo by Valentyn Ogirenko/Reuters)

British pilot Paul Bonhomme flies under a chain bridge with his Edge 540 V2 during the practice session at the Red Bull Air Race World Championship in Budapest, Hungary July 3, 2015. (Photo by Laszlo Balogh/Reuters)

Australian pilot Matt Hall flies above the River Danube during the Masters free practice session of the Red Bull Air Race World Series Budapest stage in central Budapest, Hungary, July 3, 2015. The race is to be held on July 5. (Photo by Zsolt Szigetvary/EPA)

Solar Impulse 2, a plane powered by the sun's rays and piloted by Andre Borschberg, approaches Kalaeloa Airport near Honolulu, Friday, July 3, 2015. His 120-hour voyage from Nagoya, Japan broke the record for the world's longest nonstop solo flight, his team said. (Photo by Jean Revillard/Global Newsroom via AP Photo)

In this photo provided by Jean Revillard, Solar Impulse 2, a plane powered by the sun's rays and piloted by Andre Borschberg, approaches Kalaeloa Airport near Honolulu, Friday, July 3, 2015. (Photo by Jean Revillard/Global Newsroom via AP Photo)

Solar Impulse 2, a plane powered by the sun's rays and piloted by Andre Borschberg, approaches Kalaeloa Airport near Honolulu, Friday, July 3, 2015. (Photo by Jean Revillard/Global Newsroom via AP Photo)

The Solar Impulse 2 airplane, piloted by Andre Borschberg, lands at Kalaeloa Airport in Kapolei, Hawaii, after flying non-stop from Nagoya, Japan, July 3, 2015. The Solar Impulse, which took off from Japan on Monday on the seventh leg of its journey and landed in Hawaii early on Friday, shattered the solo-flight record threshold of 76 hours whilst crossing the Pacific. The solo record was previously set in 2006 by American adventurer Steve Fossett, who flew the Virgin Atlantic Global Flyer for 76 hours non-stop. (Photo by Hugh Gentry/Reuters)

The Solar Impulse 2 airplane, piloted by Andre Borschberg, lands at Kalaeloa Airport in Kapolei, Hawaii, after flying non-stop from Nagoya, Japan, July 3, 2015. (Photo by Hugh Gentry/Reuters)

Pilot Andre Borschberg waves to the crowd as he is escorted by pilot Bertrand Piccard (L) and the Swiss Ambassador to the U.S. Martin Dahinden (front L) after the Solar Impulse 2 airplane landed at Kalaeloa airport after flying non-stop from Nagoya, Japan in Kapolei, Hawaii, July 3, 2015. (Photo by Hugh Gentry/Reuters)

The Solar Impulse 2 airplane is greeted by hula dancers after it landed at Kalaeloa airport after flying non-stop from Nagoya, Japan in Kapolei, Hawaii, July 3, 2015. (Photo by Hugh Gentry/Reuters)

Pilot Andre Borschberg waves to the crowd after he landed the Solar Impulse 2 airplane at Kalaeloa airport after flying non-stop from Nagoya, Japan in Kapolei, Hawaii, July 3, 2015. The aircraft, powered only by the sun's energy and piloted alternatively by Swiss explorers Borschberg and Bertrand Piccard, has broken a world record for the longest non-stop solo flight, the project team said on Thursday. (Photo by Hugh Gentry/Reuters)

Aleksandra Krunic of Serbia serves during her match against Venus Williams of the U.S.A. at the Wimbledon Tennis Championships in London, July 3, 2015. (Photo by Stefan Wermuth/Reuters)

Fans react on “Murray Mound” to the match between Heather Watson of Britain and Serena Williams of the U.S.A. at the Wimbledon Tennis Championships in London, July 3, 2015. (Photo by Toby Melville/Reuters)

Maria Sharapova of Russia serves during her match against Irina-Camelia Begu of Romania at the Wimbledon Tennis Championships in London, July 3, 2015. (Photo by Toby Melville/Reuters)

Maria Sharapova of Russia prepares to serve during her match against Irina-Camelia Begu of Romania at the Wimbledon Tennis Championships in London, July 3, 2015. (Photo by Toby Melville/Reuters)

Anti-austerity demonstrators tussle with a motorcycle policeman in Syntagma Square in Athens during an anti-Austerity rally, Greece, July 3, 2015. An opinion poll on Greece's bailout referendum published on Friday pointed to a slight lead for the Yes vote, on 44.8 percent, against 43.4 percent for the No vote that the leftwing government backs. (Photo by Jean-Paul Pelissier/Reuters)

A riot policeman holds a chair during minor clashes with demonstrators before a rally organized by supporters of the No vote in Athens, Friday, July 3, 2015. A new opinion poll shows a dead heat in Greece's referendum campaign with just two days to go before Sunday's vote on whether Greeks should accept more austerity in return for bailout loans. (Photo by Spyros Tsakiris/AP Photo)

A man walks during low tide at Lau Fau Shan, famous for its oyster culture, in Hong Kong's rural New Territories July 3, 2015. The fast developing city of Shenzhen on mainland China is seen in the background. (Photo by Bobby Yip/Reuters)

Members of the Calgary Stampeders cheerleading squad march during the Calgary Stampede parade in Calgary, Alberta, July 3, 2015. (Photo by Todd Korol/Reuters)

A member of the Stoney First Nation wears a headdress during the Calgary Stampede parade in Calgary, Alberta, Friday, July 3, 2015. (Photo by Jeff McIntosh/The Canadian Press via AP Photo)

Pilgrims pray as Pope Francis leads a special audience for members of the Renewal in the Holy Spirit movement in Saint Peter's Square at the Vatican July 3, 2015. (Photo by Alessandro Bianchi/Reuters)

Horses gallop as they are rounded up during the “Rapa das Bestas” traditional event in the village of Sabucedo, northwestern Spain July 3, 2015. On the first weekend of the month of July, hundreds of wild horses are rounded up, trimmed and groomed in different villages in the Spanish northwestern region of Galicia. (Photo by Miguel Vidal/Reuters)

Horses gallop during the “Rapa das Bestas” traditional event in the village of Sabucedo, northwestern Spain July 3, 2015. (Photo by Miguel Vidal/Reuters)

Revellers try to hold on to a wild horse to cut its mane and mark it, during the “Rapa das Bestas” traditional event in the village of Sabucedo, northwestern Spain July 3, 2015. (Photo by Miguel Vidal/Reuters)

An almost finished sculpture of a fiberglass horse is seen at a warehouse in Ciudad Juarez, Mexico, July 3, 2015. In order to attract tourism and to show an improvement of the urban image, the local government will exhibit 20 fiberglass horses, designed and painted by urban artists, in some of the most transited areas of the border city, local media reported. (Photo by Jose Luis Gonzalez/Reuters)

A woman holds a banner supporting Greece during a pro-Greece protest in front of the European Union office in Barcelona, Spain, July 3, 2015. The banner reads in Spanish and Greek, “Greece says NO to a German Europe”. (Photo by Albert Gea/Reuters)

People look at the window with Benfica flag the coffin of Portuguese soccer legend Eusebio during the transfer ceremony to the National Pantheon in Lisbon, Portugal, July 3, 2015. (Photo by Hugo Correia/Reuters)

Trent Kure of Red Deer, Alberta, gets bucked off “Yodelling Lizard” in the novice saddle brand event during the Calgary Stampede rodeo in Calgary, Alberta, July 3, 2015. (Photo by Todd Korol/Reuters)

A girl holds up a sign that reads, “No to Fear” in Greek during an anti-austerity demonstration in Syntagma Square in Athens, July 3, 2015. Tens of thousands of Greeks rallied on Monday to back their leftwing government's rejection of a tough international bailout after a clash with foreign lenders pushed Greece close to financial chaos and forced a shutdown of its banking system. (Photo by Yannis Behrakis/Reuters)

A woman dressed in white in accordance with the Afro-Cuban religion Santeria walks with an umbrella to shield herself from the sun in Havana, Cuba July 3, 2015. Pope Francis will be visiting Cuba from September 19 to September 22. (Photo by Alexandre Meneghini/Reuters)

An engineer carries out an inspection of the floodgates during a visit to view the new set of locks of the Panama Canal Expansion Project on the Pacific side of the Panama Canal on the outskirts of Panama City July 3, 2015. According to the authorities of the Grupos Unidos por el Canal (GUPC), the contractor for the project, the floodgates of the new set of locks on both the Atlantic and Pacific sides of the canal are still being electromechanically tested, and are expected to be operational in 2016. (Photo by Carlos Jasso/Reuters)

Firefighters battle a blaze after a St. Anthony's Flight for Life helicopter crashed in Frisco, Colorado July 3, 2015. Three people were injured when a rescue helicopter crashed on takeoff from Frisco, according to news reports. (Photo by Reuters/Lake Dillon Fire-Rescue)

Different ways of wearing the U.S. flag are seen in this combination picture of images taken in New York on July 2 and July 3, 2015, ahead of the Fourth of July holiday. The U.S. celebrates its Independence Day on July 4. (Photo by Andrew Kelly/Reuters)

During a decorous ceremony a coffin is driven from the RAF C-17 which carried the bodies of eight British nationals killed in the recent Tunisia beach terror attack, arriving at RAF Brize Norton, England, Friday July 3, 2015. People around Britain paused in streets and workplaces on Friday to honor the victims of an Islamic extremist's rampage at the Tunisian beach resort of Sousse. (Photo by Darren Staples/Pool via AP Photo)

Pakistani children wait to receive milk mixed with fruit juice to break the day's fast that many Muslims practice during the month of Ramadan in Karachi, Pakistan, Friday, July 3, 2015. Muslims across the world are observing the holy fasting month of Ramadan, where they refrain from eating, drinking and smoking from dawn to dusk. (Photo by Fareed Khan/AP Photo)

People extend their bottles to get milk mixed with fruit juice to break the day's fast, that many Muslims practice during the month of Ramadan in Karachi, Pakistan, Friday, July 3, 2015. (Photo by Fareed Khan/AP Photo)

A demonstrator shows her hands reading the word “NO” during a rally organized by supporters of the No vote in Athens, Friday, July 3, 2015. A new opinion poll shows a dead heat in Greece's referendum campaign with just two days to go before Sunday's vote on whether Greeks should accept more austerity in return for bailout loans. (Photo by Petros Giannakouris/AP Photo)

In this June 26, 2015 photo, a baby red-tailed hawk and its mother, Rusty, watch the door of their enclosure at the West Virginia Raptor Rehabilitation Center near Fairmont, W.Va. The baby hawk is the first to be born at the center in 32 years. (Photo by Tammy Shriver/Times-West Virginian via AP Photo)

In this June 26, 2015 photo, a baby red-tailed hawk watches the door of its enclosure at the West Virginia Raptor Rehabilitation Center near Fairmont, W.Va. (Photo by Tammy Shriver/Times-West Virginian via AP Photo)

Muslim brotherhood supporters throw rocks at a protest to mark the second anniversary of the military's overthrow of Islamist President Mohammed Morsi, Giza, Egypt, Friday, July 3, 2015. When he led the army's overthrow of Egypt's Islamist president two years ago, Abdel-Fattah el-Sissi promised to usher in new stability for the country. Instead, now President el-Sissi is facing an even tougher challenge: An Islamic militant insurgency that unleashed its worst violence yet the past week. (Photo by Amr Sayed/AP Photo)

Smoke rises from a CSX train following the derailment of a train car, Thursday, July 2, 2015, in Maryville, Tenn. The derailment of the car, carrying a flammable and toxic substance, caused the evacuation of thousands in the surrounding area. (Photo by Michael Patrick/Knoxville News Sentinel via AP Photo)

German swimmer Franziska Hentke of SC Magdeburg competes in the 200 metre butterfly at the German Open in Essen, Germany, 3 July 2015. She broke the German record. (Photo by Martin Schutt/EPA)