In this April 16, 2016 photo. a University of Florida student uses a brain-controlled interface headset to fly a drone during a mind-controlled drone race in Gainesville, Fla. For more than a century science has been able to detect brainwaves, but recent advances in cheaper equipment like the electroencephalogram, or EEG, headsets worn by the drone racers is moving the technology out of the lab. (Photo by Jason Dearen/AP Photo)





A visitor walk through an installation in the Sky Circus, an observatory on top of the Sunshine 60 building in Tokyo, Japan, 22 April 2016. The newly renovated observatory opened to the public on 21 April 2016. The Sunshine 60 building is 240 m tall, and was the tallest building in Japan for nearly a decade and was the tallest in Asia until 1985, after the completion of the 63 Building in Seoul, South Korea. (Photo by Franck Robichon/EPA)





Members of the Seminole Warriors Mardi Gras Indians perform at the New Orleans Jazz and Heritage Festival in New Orleans, Friday, April 22, 2016. (Photo by Gerald Herbert/AP Photo)





Police officers stand guard at the National Electoral Council (CNE) headquarters in Caracas, Venezuela, April 21, 2016. (Photo by Marco Bello/Reuters)





Local residents line up to receive food in Manta, after an earthquake struck off Ecuador's Pacific coast, April 21, 2016. (Photo by Henry Romero/Reuters)





An artist's illustration showing the size comparisons of a newborn dinosaur called Rapetosaurus (2nd from L) that lived on the island of Madagascar to some large-bodied mammalian newborns such as a baby black rhino, African elephant, hippo and dog. Scientists April 21, 2016 announced the discovery of fossils of a baby Rapetosaurus the size of a big dog that apparentlystarved to death during a drought several weeks after hatching from its soccer-ball-sized egg. (Photo by D.Vital/Reuters)





A Shinto priest welcomes Japanese lawmakers as they visit the Yasukuni shrine in Tokyo, Japan April 22, 2016. (Photo by Thomas Peter/Reuters)





A prototype of the first Japan-made stealth fighter X-2 Shinshin, formerly called ATD-X, takes off to mark its maiden flight at Nagoya Airfield, also known as Komaki Airport, in Toyoyama town, Aichi prefecture, central Japan, in this photo taken by Kyodo April 22, 2016. (Photo by Reuters/Kyodo News)





A fishing boat is seen on the dried ground at the Tisma lagoon wetland park due to drought affecting Tisma town, Nicaragua April 20, 2016. (Photo by Oswaldo Rivas/Reuters)





Photographer holds a photograph took in 2008, as he is on the dried ground at the Tisma lagoon wetland park due to drought affecting Tisma town, Nicaragua April 20,2016. (Photo by Oswaldo Rivas/Reuters)





A van emblazoned with decals supporting Democratic U.S. presidential candidate Bernie Sanders stands on a street outside a location where he addressed supporters in West Philadelphia, Pennsylvania, U.S., April 22, 2016. (Photo by Lucas Jackson/Reuters)





Employees of Korea Railroad Corp (KORAIL) examine the derailed Mugunghwa train in Yeosu, South Korea, April 22, 2016. (Photo by Hwang Hee-kyu/Reuters/News1)





A scavenger wades through a polluted river using a makeshift raft made of styrofoam to collect reusable items at Capulong Tondo, metro Manila, Philippines April 22, 2016. (Photo by Romeo Ranoco/Reuters)





A scavenger wades through a polluted river using a makeshift raft made of styrofoam to collect reusable items at Capulong Tondo, metro Manila April 22, 2016. (Photo by Romeo Ranoco/Reuters)





A scavenger wades through a polluted river using a makeshift raft made of styrofoam to collect reusable items at Capulong Tondo, metro Manila April 22, 2016. (Photo by Romeo Ranoco/Reuters)





The sun rises next to a Buddha statue while monks and novices gather to receive alms at Wat Phra Dhammakaya temple, in what organizers said was a meeting of over 100,000 monks in Pathum Thani, outside Bangkok, April 22, 2016. (Photo by Jorge Silva/Reuters)





An employee experiences “birth” through a latex “womb” at a Wake and Death Experience Pavilion in Shanghai, China, April 22, 2016. (Photo by Aly Song/Reuters)





An employee demonstrates in one of the nine closed experience spaces in the Wake and Death Experience Pavilion in Shanghai, China, April 22, 2016. (Photo by Aly Song/Reuters)





An employee demonstrates in one of the nine closed experience spaces in the Wake and Death Experience Pavilion in Shanghai, China, April 22, 2016. (Photo by Aly Song/Reuters)





Gennady Zyuganov (L), leader of the Russian Communist Party, and Russian American heavyweight mixed martial artist Jeff Monson attend a flower-laying ceremony to Soviet state founder Vladimir Lenin's mausoleum marking his birthday in Moscow's Red Square, Russia, April 22, 2016. (Photo by Maxim Zmeyev/Reuters)





Two Russian communists' supporters stand in Red Square holding a portrait of Vladimir Lenin and a red flag as they wait to visit the Mausoleum of the Soviet founder Vladimir Lenin to mark the 146th anniversary of his birth in Moscow, Russia, Friday, April 22, 2016. (Photo by Pavel Golovkin/AP Photo)





An Ultra-Orthodox Jewish man prays before burning leaven in the Mea Shearim neighbourhood of Jerusalem ahead of the Jewish holiday of Passover, April 22, 2016. Jews are forbidden to eat leavened foodstuffs during the Passover holiday that celebrates the biblical story of the Israelites' escape from slavery and exodus from Egypt. (Photo by Ammar Awad/Reuters)





A Kurdish female fighter from the People's Protection Units (YPG) carries her weapon as she crosses a street towards her position in the southeast of Qamishli city, Syria, April 22, 2016. (Photo by Rodi Said/Reuters)





Kurdish fighters from the People's Protection Units (YPG) take cover behind a military vehicle as they advance in the southeast of Qamishli city, Syria, April 22, 2016. (Photo by Rodi Said/Reuters)





Stewardesses wait inside the new satellite facility for Munich Airport's Terminal 2 before the official opening ceremony, southern Germany, April 22, 2016. (Photo by Michael Dalder/Reuters)





South Korea's C-130 military aircraft carrying aid materials for those affected by multiple large-scale earthquakes in the Kumamoto region is seen at the Japan Ground Self Defense Force's Takayubaru Camp in Mashiki town, Kumamoto prefecture, southern Japan, April 22, 2016. (Photo by Reuters/Joint Staff of the Defence Ministry of Japan)





An aerial view shows a giant advertisement of Swiss knife manufacturer Victorinox on a field on the approach to Zurich airport near Niederglatt, Switzerland, April 22, 2016. (Photo by Arnd Wiegmann/Reuters)





The Presidential Marine 1 helicopter departs Windsor Castle on April 22, 2016 in Windsor, England. The President and his wife are currently on a brief visit to the UK where they will have lunch with HM Queen Elizabeth II at Windsor Castle and dinner with Prince William and his wife Catherine, Duchess of Cambridge at Kensington Palace. Mr Obama will visit 10 Downing Street on Friday afternoon where he is to hold a joint press conference with British Prime Minister David Cameron and is expected to make his case for the UK to remain inside the European Union. (Photo by Ian Gavan/Getty Images)





Secret Service agents stand on duty as one of the U.S. President's helicopters lands at Windsor Castle where President Barack Obama and his wife Michelle attended a private lunch with Britain's Queen Elizabeth and Prince Philip, in Windsor, Britain, April 22, 2016. (Photo by Jack Hill/Reuters)





The hearse transports the coffin containing the body of former Chilean President Patricio Aylwin to the cemetery in Santiago, Chile April 22, 2016. (Photo by Ivan Alvarado/Reuters)





Peruvian Rescue team members return from a mission to help Ecuador earthquake victims, at a naval aviation base in Callao, Peru, April 22, 2016. (Photo by Janine Costa/Reuters)





A relative carries 100-year-old Mariana Trivino in a rickshaw, after receiving food and water in Canoa, Ecuador, Thursday, April 21, 2016. President Rafael Correa said Ecuador's worst earthquake in decades caused billions of dollars of damage and he is raising sales taxes and putting a one-time levy on millionaires to help pay for reconstruction. (Photo by Rodrigo Abd/AP Photo)





Kew Garden's Titan Arum, also know as The Big Stink due to its repulsive odour is in rare full bloom at Kew Gardens on April 22, 2016 in London, England. The flower can weigh up to 70kg and is housed in the Prince of Wales Conservatory. (Photo by Stuart C. Wilson/Getty Images)





A supporter of Thai former Prime Minister Yingluck Shinawatra wears a headband decorated with pictures of Yingluck Shinawatra (R) and her brother fugitive former Prime Minister Thaksin Shinawatra (L) outside the Supreme Court's Criminal Division for Holders of Political Positions, in Bangkok, Thailand, 22 April 2016. Yingluck Shinawatra is on trial for criminal charges stemming from her government's rice price subsidy. The rice subsidy plan was a key promise during Yingluck Shinawatra's Pheu Thai party's 2011 electoral campaign. It was also a major talking point for her opposition which accused the government of mismanagement and corruption related to the scheme. Under the plan, the government bought rice from farmers at a fixed rate, sometimes 50 percent higher than world market prices. Fluctuations in market prices and mismanagement of the stockpiles led to large losses. A military-appointed legislature and the lower courts have already impeached Yingluck over the scheme, resulting in a five-year ban from politics. (Photo by Narong Sangnak/EPA)





Joshua Patino stands on a ladder to put finishing touches on a giant dinosaur exhibit at PAX East in the Boston Convention and Expo Center, Thursday, April 21, 2016, in Boston. PAX East, an annual celebration of gaming culture, is expected to draw tens of thousands of visitors Friday through Sunday. It's a place where serious gamers can preview unreleased video games and devices, compete in tournaments, hear live music and meet others for whom gaming is a way of life. (Photo by Elise Amendola/AP Photo)





Jasper Rose, of Watertown, Mass., stands near Myrtle, a green sea turtle swimming in the main tank at the New England Aquarium Friday, April 22, 2016, in Boston. The 6-year-old's love of sea turtles prompted him to skip his birthday gifts and instead asked for money to donate for sea turtle rescue efforts. He has so far raised $550. (Photo by Bill Sikes/AP Photo)





In thi November 4, 2014, file photo, visitors to the 16th China International Industry Fair (CIIF) look at a prototype of what a Chinese Mars rover would look like in Shanghai, China. Head of the China National Space Administration Xu Dazhe said Friday, April 22, 2016 at a rare news conference that plans are being drawn up for the project that was formally announced in January and that it has the government's full support. (Chinatopix via AP Photo)





Spanish MotoGP rider Hector Barbera of the Avintia Racing team in action during the first practice session of the Spanish Motorcycling Grand Prix at the circuit of Jerez, southern Spain, 22 April 2016. The Motorcycling Grand Prix of Spain will take place in Jerez on 24 April 2016. (Photo by Roman Rios/EPA)





Hindu devotees shower in water pouring from 22 waterspouts during Balaju Purnima, also known as the full moon festival, in Katmandu, Nepal, 22 April 2016. Hundreds of devotees gathered to take a ritual bath and pay reverence to the waterspouts in hopes of being granted protection from illness, and a better life. (Photo by Narendra Shrestha/EPA)





Uzbekistan's Elizaveta Nazarenkova participates in the Individual All-Around Qualification round of the Rhythmic Gymnastics test event at the Olympic Arena, in Rio de Janeiro, Brazil, 21 April 2016. (Photo by Marcelo Sayao/EPA)





Protesters are pushing with the riot police, during the protest dubbed “colorful revolution” against Macedonian President Ivanov's decision on wiretapping amnesty, in Skopje, The Former Yogoslav Republic of Macedonia, 21 April 2016. Ivanov on 12 April decided to abolish all judicial cases related to the big wire-tapping scandal that brought the country to early general elections scheduled for 05 June. The crisis started in 2015 when opposition SDSM started to publish illegally recorded wire-tapped phone conversations of the highest Governmental officials claiming they show financial crime and eventual evidences of electoral frauds of the ruling conservative VMRO-DPMNE party of then PM Gruevski. Gruevski denied everything saying “foreign intelligence services” are trying to topple his Government he was administrating from 2006. (Photo by Nake Batev/EPA)





A local jumps over the La Cangreja River filled with rubbish and plastic bottles, in northeastern San Jose, Costa Rica, 21 April 2016. Although Costa Rica maintains 25% of its protected territory, the country is losing its biological resources, mainly due to climate change, pollution and lack of awareness of the population on the handling of recyclable waste. Earth Day is celebrated on 22 April. (Photo by Jeffrey Arguedas/EPA)





A plane flies past a dome wall made from 1.5 million recyclable PET plastic bottles during the earth day celebration in Taipei, Taiwan, 22 April 2016. Earth Day is celebrated annually on 22 April, to raise awareness and develop a sense of public responsibility pertaining to environmentally-sustainable practices in order to build and maintain a healthy, global ecosystem and maintain a viable planet for future generations. (Photo by Ritchie B. Tongo/EPA)





In this Wednesday, April 20, 2016 photo, Green dye makes its way through Ketchikan Creek in Ketchikan, Alaska. Authorities say the green water flowing in the Ketchikan Creek that caused some panic and drew a response from multiple agencies was the result of a prank. Officials have determined that the dye dumped into the water on Wednesday is non-toxic. Ketchikan police talked to the man responsible for the dye, but he was not arrested or cited. (Photo by Taylor Balkom/Ketchikan Daily News via AP Photo)





Hand-made dolls sit in a shelter as others are placed around the village by local resident Tsukimi Ayano to replace the dwindling local population on April 22, 2016 in Nagoro village, in Miyoshi, Japan. Likely more dolls than the number of inhabitants are placed around the village called “Kakashi No Sato”. According to Japan's Statistic Bureau, the percentage of people over 65 years old in Japan is 26.8% while that of the the world is 8.2%. The National Institute of Population and Social Security Research in Tokyo, Japan's population, now around 128 million, is expected to dip below 100 million in 2046. (Photo by Carl Court/Getty Images)





Children receive schooling as U.S. Ambassador to the United Nations Samantha Power visits Malkohi Internally Displaced Person Camp in Yola, Nigeria, Friday, April 22, 2016. Power is traveling to Cameroon, Chad, and Nigeria to highlight the growing threat Boko Haram poses to the Lake Chad Basin region. (Photo by Andrew Harnik/AP Photo)





This picture taken on April 21, 2016 shows an Indonesian policeman holding a dead (L) and living bird (R) after they foiled a bird smuggling operation in Surabaya. Indonesian police on April 21 foiled the smuggling operation of 34 listed protected birds, with eight of them dead due to suffocation as smugglers transported them in plastic bottles from Papua to Surabaya. (Photo by Juni Kriswanto/AFP Photo)





Flower plants are seen grown in a computer monitor shell at E-Parisaraa, an electronic waste recycling company in Dabaspet 48 Kilometers (30 miles) from Bangalore, India, Friday, April 22, 2016. Countries around the world annually recognize April 22 as Earth Day with hopes in urging local action and increasing awareness about the state of the world's environment. (Photo by Aijaz Rahi/AP Photo)





Actor Leonardo Di Caprio, a United Nations Messenger of Peace, speaks at the signing ceremony for the Paris Agreement on climate change, Friday, April 22, 2016 at U.N. headquarters. Behind him French President Francois Hollande, second left, and Secretary General Ban Ki-moon applaud. (Photo by Mark Lennihan/AP Photo)





A girl identified as Monica, listens to a translator explain how she managed to escape Boko Haram during a Bring Back Our Girls vigil in Abuja, Nigeria, Thursday, April 21, 2016, which, two years after Boko Haram abducted the girls from their school, is still held daily. A total of 219 girls remain missing, and Power said she couldn't imagine the frustration of the families. Power is traveling to Cameroon, Chad, and Nigeria to highlight the growing threat Boko Haram poses to the Lake Chad Basin region. (Photo by Andrew Harnik/AP Photo)





An early evening view of the poppy installation at St. Magnus Cathedral, April 21, 2016, in Kirkwall, Scotland. The poppy sculpture “Weeping Window” has opened marking the start of the UK's Battle of Jutland centenary commemorations. The sculpture is part of “Blood Swept Lands and Seas of Red” by artist Paul Cummins and designer Tom Piper. (Photo by Michael Bowles/Getty Images)





Women sit together in the shade of a tree as U.S. Ambassador to the United Nations Samantha Power speaks to them while visiting the Malkohi Internally Displaced Person Camp in Yola, Nigeria, Friday, April 22, 2016. Power is traveling to Cameroon, Chad, and Nigeria to highlight the growing threat Boko Haram poses to the Lake Chad Basin region. (Photo by Andrew Harnik/AP Photo)





Volunteers carry elephant tusks to a burning site on April 22, 2016 for a historic destruction of illegal ivory and rhino-horn confiscated mostly from poachers in Nairobi's national park. Kenya on April 30, 2016 will burn approximately 105 tonnes of confiscated ivory, almost all of the country's total stockpile. Several African heads of state, conservation experts, high-profile philanthropists and celebrities are slated to be present at the event which they hope will send a strong anti-poaching message. (Photo by Tony Karumba/AFP Photo)





A Syrian man evacuates an area following a reported airstrike on April 22, 2016 in the rebel-held neighbourhood of Hayy Aqyul in Syria's second city Aleppo. Air strikes on rebel-held neighbourhoods in Syria's second city Aleppo killed at least 14 civilians and wounded more than a dozen others, the local civil defence told AFP. The Syrian Observatory for Human Rights said regime warplanes carried out the air strikes and gave a toll of 10 dead. (Photo by Ameer Alhalbi/AFP Photo)





Picture shows the Gandolfi 2 spacesuit outside the SHEE (Self-Deployable Habitat for Extreme Environments) during the Moonwalk project's first Mars mission simulation in the southwestern Spanish town of Minas de Riotinto, Huelva province, on April 22, 2016. The goal of project MOONWALK is to develop and test technologies and training procedures for future human missions to Moon and Mars. (Photo by Jorge Guerrero/AFP Photo)