Demonstrators pull a barrier as federal policemen try to stop them during a protest against the visit of Mexico's President Enrique Pena Nieto to the city, in Ciudad Juarez January 14, 2015. (Photo by Jose Luis Gonzalez/Reuters)

A woman holds a Palestinian flag and shouts slogans during celebrations marking the fourth anniversary of Tunisia's 2011 revolution, in Habib Bourguiba Avenue in Tunis January 14, 2015. (Photo by Anis Mili/Reuters)

American Yoga teacher Dashama poses on a Yoga-board during a preview of the 46th International Boat Fair in Duesseldorf January 16, 2015. The BOOT 2015 watersports fair, with more than 1,600 international exhibitors will run in Duesseldorf from January 17 to January 25. (Photo by Ina Fassbender/Reuters)

Israeli soldiers arrest a Palestinian protester during clashes following a protest against the near-by Jewish settlement of Qadomem, in the West Bank village of Kofr Qadom near Nablus January 16, 2015. (Photo by Abed Omar Qusini/Reuters)

Members of the Swiss aerobatic team Patrouille Swiss fly in formation with a Swiss Airbus A 320 over the men's Alpine Skiing World Cup Super Combined in Wengen January 16, 2015. (Photo by Ruben Sprich/Reuters)

A protester throws a paint bottle at a riot police armoured personnel carrier during clashes in the village of Bilad al-Qadeem, south of Manama January 16, 2015. Protesters clashed with riot police as they called for the immediate release of Bahrain's main opposition party al-Wefaq's General Secretary Sheikh Ali Salman, who was arrested on December 28, 2014, after leading a protest rally against elections that were held in November and which his party boycotted, prompting U.S. criticism. Salman's lawyer, Abdulla al-Shamlawi told Reuters he had been formally charged by the public prosecutor with inciting a change of government by force, inciting hatred of a segment of society, inciting others to break the law and publicly insulting the Interior Ministry. (Photo by Hamad I. Mohammed/Reuters)

A tourist mounts the “Charging Bull” statue as he poses for a photo near Wall Street, in the Manhattan borough of New York January 16, 2015. (Photo by Carlo Allegri/Reuters)

Swiss franc coins are seen in a cash drawer in this picture illustration in Bern January 16, 2015. German bond yields hit record lows on Friday while fears about Greek banks sent the country's borrowing costs spiralling – signs of the fallout from the Swiss National Bank's shock decision to scrap its currency cap. A surge in the Swiss franc after the SNB abandoned its 1.20 euro limit on Thursday saw investors flee equities and other risky assets, parking money instead in top-rated bonds. (Photo by Thomas Hodel/Reuters)

Living statue ballerina Therisa Barber-Shaw performs for tips in the Times Square subway station in the Manhattan borough of New York January 16, 2015. (Photo by Carlo Allegri/Reuters)

A woman reacts as she sees the dead body of her son at a crime scene in the town of Mejicanos October 10, 2014. United Nations Secretary-General Ban Ki-moon said on Friday he was concerned by the violence in Central America and El Salvador, which has seen a sharp spike in murders and police assassinations over the last year. Visiting the poor Central American country to celebrate the 23rd anniversary of the peace accords that ended a 12-year civil war that killed around 75,000 people, Ban urged El Salvador to remember that spirit of reconciliation as it grapples with a rising spate of gang warfare. (Photo by Jose Cabezas/Reuters)

A police officer stands guard at the cemetery during the funeral of a fellow police officer who was killed by alleged gang members in San Juan Opico, January 12, 2015. (Photo by Jose Cabezas/Reuters)

A police officer stands guard next to alleged gang members who are accused of killing a private security agent at the central market in San Salvador October 8, 2014. (Photo by Jose Cabezas/Reuters)

Women wash the blood off a sidewalk where a taxi driver had been killed by alleged gang members in Cuscatancingo October 2, 2014. (Photo by Jose Cabezas/Reuters)

Ohio State football players high-five fans outside the Woody Hayes Athletic Center on The Ohio State University campus Tuesday, January 13, 2015, in Columbus, Ohio. Ohio State defeated Oregon 42-20 in the National Championship football game. (Photo by Tony Dejak/AP Photo)

Police officers arrest a protester who banged a spoon on a subway car during a demonstration at the Bay Area Rapid Transit Montgomery station on Friday, January 16, 2015, in San Francisco. About 80 demonstrators rallied in support of 14 anti-police violence protesters arrested in November for blocking trains at an Oakland BART station. (Photo by Noah Berger/AP Photo)

A Hindu man pulls his cow to walk over fire as part of “Makar Sankranti” celebrations in Bangalore, India, Thursday, January 15, 2015. Cows and bulls are given a wash and the horns painted with bright colors and decorated with garlands during Makar Sankranti, a Hindu festival which marks the return of the sun to the northern hemisphere and the end of the harvesting season. (Photo by Aijaz Rahi/AP Photo)

Models peel the sides away of a box unveiling the new Audi Q7 SUV inside, at the North American International Auto Show, Monday, January 12, 2015, in Detroit. (Photo by Tony Ding/AP Photo)

Totolinha, left, and Rato pose for a photo during Rio Tattoo Week in Rio de Janeiro, Brazil, Friday, January 16, 2015. Tattoo artists from Brazil and around the world gathered for the annual three day convention. (Photo by Silvia Izquierdo/AP Photo)

A Mishing tribal woman smokes meat at a temporary stall during an ongoing ethnic food festival as part of festivities to mark Bhogali Bihu festival in Gauhati, India , Saturday, January 10, 2015. Bhogali Bihu is the harvest festival of Assam state and is observed in January every year. (Photo by Anupam Nath/AP Photo)

The Ara Yevi samba school put the finishing to touches on one of their floats, decorated with Pope Francis, before the carnival parade in Gualeguaychu, Argentina, Saturday, January 10, 2015. This one of four floats that pays tribute to the Pope, highlighting his arrival to the Vatican, his love for soccer and tango dance, and his work with the poor. (Photo by Natacha Pisarenko/AP Photo)

The Ara Yevi samba school performs on a float showcasing Pope Francis during carnival in Gualeguaychu, Argentina, early Sunday, January 11, 2015. Members of the samba school said the Pope doesn't know they chose to honor his life at this year's celebration and look forward for him seeing their performing. (Photo by Natacha Pisarenko/AP Photo)

A driver manages to save his car from a flooded parking lot at the Fish Market in Hamburg, Germany, 11 January 2015. Strong winds caused several storm surges in Northern Germany. (Photo by Daniel Bockwoldt/EPA)

The house technicians at Ozeaneum Stralsund use a vacuum cleaner on the 15-meter-long sperm whale and the 10-meter-long giant squid in the exhibition hall showing “Giants of the Sea 1:1”, in Stralsund, Germany, 13 January 2015. Since the last cleanup, a two-millimeter thick dust layer has formed on the surface of the sperm whale. (Photo by Stefan Sauer/EPA)

A young girl prays with her family during a service held under tents in place of the Sacré-Coeur church that was destroyed five years ago by a magnitude 7.0 earthquake that struck just before 5 p.m. on Jan. 12, 2010, destroying buildings and killing as many as 316,000 people on January 11, 2015 in Port-au-Prince, Haiti. Five years later the church has begun to be rebuilt and the city of Port-au-Prince struggles to recover even as the government is now locked in a stalemate over parliamentary elections that have been delayed for over three years, with almost daily protests occurring the people are asking for the elections to take place. (Photo by Joe Raedle/Getty Images)

A pianist wears special gloves with motion sensors and plays a keyboard to record fingerwork at the Wearable Device Technology Expo in Tokyo on January 14, 2015. Japanese music instruments maker Yamaha developed the gloves with 12 sensors of frexible nanomaterial consisting of aligned carbon nano tubes to monitor players' fingering. (Photo by Yoshikazu Tsuno/AFP Photo)

A Ohio State Buckeyes cheerleader falls as the Buckeyes run out to the field before the College Football Playoff National Championship Game at AT&T Stadium on January 12, 2015 in Arlington, Texas. (Photo by Tom Pennington/Getty Images)

A close up of a Holographic Lamborghini Aventador is seen at the Tokyo Auto Salon 2015 at Makuhari Messe on January 9, 2015 in Chiba, Japan. (Photo by Keith Tsuji/Getty Images)

Firefighters participate in an anti-terror and chemical drill at the Rizal Park ahead of the papal visit to the area on January 14, 2015 in Manila, Philippines. Pope Francis will visit venues across Leyte and Manila during his visit to the Philippines from January 15 – 19. The visit is expected to attract crowds in the millions as Filipino Catholics flock to catch a glimpse of the leader of the Catholic Church in the Philippines for the first time since 1995. The Pope will begin the tour in Manila, then travelling to Tacloban to visit areas devastated by Typhoon Haiyan before returning to Manila to hold a mass at Rizal Park. The Philippines is the only Catholic majority nation in Asia with around 90 percent of the population professing the faith. (Photo by Lam Yik Fei/Getty Images)

Afghan prisoners leave jail following their release by the orders of Afghan President Ashraf Ghani, in Jalalabad, Afghanistan, 15 January 2015. Afghan President ordered some 27 prisoners including 9 women with less than a year to serve to be released in honor of Prophet Muhammad's birthday. (Photo by Ghulamullah Habibi/EPA)

In this Wednesday, January 14, 2015 photo Russian-backed separatist walks past tanks at the check-point north of Luhansk, Eastern Ukraine. An attack on a passenger bus in eastern Ukraine killed 12 people Tuesday, likely dealing the final blow to hopes that a short-lived and shaky cease-fire could take hold. (Photo by Mstyslav Chernov/AP Photo)

Green Bay Packers fan Jeff Kahlow looks on during an NFL Divisional Playoff football game against the Dallas Cowboys Sunday, January 11, 2015 in Green Bay, Wis. The Packers won 26-21. (Photo by Mike Roemer/AP Photo)

A man rests amongst some decorations as villagers celebrate the winter festival of Malanka on January 14, 2015 in Krasnoilsk, Ukraine. The holiday, which involves dressing in elaborate costumes and going from house to house as a group singing traditional songs, is celebrated on New Year's Day of the Orthodox calendar, a week after Orthodox Christmas. (Photo by Brendan Hoffman/Getty Images)