A woman and the Chicago skyline are reflected in the snow covered, curved surface of the “Cloud Gate” sculpture in Chicago, Illinois, January 6, 2015. A bitter cold snap is freezing most of the eastern half of the United States, driving the mercury below zero in the Midwest on Monday, with possible freezing temperatures as far south as Atlanta later this week, forecasters said. (Photo by Jim Young/Reuters)

The transatlantic cruise ship of Spanish company Pullmantur Cruises is prevented from leaving the Itajai Port Complex towards its destination of Uruguay, by fishermen in Itajai, Santa Catarina state January 6, 2015. According to local media, fishermen blocked access to the port complex on Monday morning to protest a federal government measure that prohibits the fishing of endangered species, some of which are considered of commercial importance by the fishermen. (Photo by Reuters/Agencia RBS/Marcos Porto)

Sebastian-Foss Solevaag of Norway skis into the last gate during the second slalom run of the men's Alpine Skiing World Cup in Zagreb January 6, 2015. (Photo by Antonio Bronic/Reuters)

Burning Yule logs and fireworks are seen in front of Sokolica church during the eve of the Orthodox Christmas, in Ravna Romanija January 6, 2015. Most Orthodox Christians celebrate Christmas according to the Julian calendar on January 7, two weeks after most western Christian churches that abide by the Gregorian calendar. (Photo by Dado Ruvic/Reuters)

Policemen dressed as the Three Wise Men, Melchior, Balthasar and Gaspar, ride horses as they greet people during the celebration of Epiphany, or Three Kings' Day, in central Lima January 6, 2015. (Photo by Enrique Castro-Mendivil/Reuters)

Inter Milan's Mauro Icardi (L) celebrates with his team mate Fredy Guarin after scoring against Juventus during their Italian Serie A soccer match at the Juventus stadium in Turin January 6, 2015. (Photo by Giorgio Perottino/Reuters)

Women chat in front of a McDonald's restaurant in Caracas January 6, 2015. Venezuelan fast-food lovers are mourning the disappearance of McDonald's golden staple: the french fry. A recent shortage at the U.S. fast food chain comes as socialist Venezuela grapples with shortfalls of basic goods ranging from medicines to flour due to strict currency controls that stymie imports. (Photo by Carlos Garcia Rawlins/Reuters)

Six hand-picked shoppers prepare to sleep overnight in the Galeries Lafayette department store, as part of a special event on the eve of the start of winter sales, in Paris, January 6, 2015. (Photo by Charles Platiau/Reuters)

Kareen (L), from France, prepares to sleep overnight in the Galeries Lafayette department store with five other hand-picked shoppers, as part of a special event on the eve of the start of winter sales, in Paris, January 6, 2015. (Photo by Charles Platiau/Reuters)

A boot is seen covered with blood splatter at the scene of a car bomb attack at the police college in Sanaa January 7, 2015. A car bomb exploded outside a police college in Yemen's capital Sanaa early on Wednesday, killing around 30 people and wounding more than 50 others, police sources and residents said. (Photo by Mohamed al-Sayaghi/Reuters)

Cast member Kevin Hart takes a selfie with fans at the premiere of the “The Wedding Ringer” at TCL Chinese theatre in Hollywood, California January 6, 2015. The movie opens in the U.S. on January 16. (Photo by Mario Anzuoni/Reuters)

Mongolian-born grand sumo champion Yokozuna Hakuho (2nd L) performs the New Year's ring-entering rite at the annual celebration for the New Year at Meiji Shrine in Tokyo January 7, 2015. (Photo by Thomas Peter/Reuters)

Mongolian-born sumo grand champion, or “yokozuna”, Hakuho (R) performs a ring-entering ceremony beside Tsuyuharai Kaisei (L) at Meiji Shrine in Tokyo on January 7, 2015. Three sumo grand champions Hakuho, Kakuryu and Harumafuji, as well as Sumo Association leaders, made their New Year pilgrimage to the shrine on January 7, pledging to work hard to make Japan's national sport a success this year. (Photo by Toshifumi Kitamura/AFP Photo)

Russian Cossacks, dressed in a traditional uniform, guard the territory outside the Kazan Cathedral, where an Orthodox Christmas service is held, under a heavy snowfall in Stavropol, southern Russia January 7, 2015. Most Orthodox Christians celebrate Christmas according to the Julian calendar on January 7, two weeks after most western Christian churches that abide by the Gregorian calendar. (Photo by Eduard Korniyenko/Reuters)

A woman lifts a dog on a leash along the seafront in Panama City January 6, 2015. (Photo by Carlos Jasso/Reuters)

Servicemen of the Belarussian Interior Ministry's special force take part in a service near Orthodox church at a military base in Minsk January 7, 2015. Most Orthodox Christians celebrate Christmas according to the Julian calendar on January 7, two weeks after most western Christian churches that abide by the Gregorian calendar. (Photo by Vasily Fedosenko/Reuters)

Boys build a snowman during a winter storm in Jabal al-Zawiya, in the southern countryside of Idlib January 7, 2015. A storm buffeted the Middle East with blizzards, rain and strong winds on Wednesday, keeping people at home across the region and raising concerns for Syrian refugees facing freezing temperatures in flimsy shelters. (Photo by Reuters/Stringer)

People celebrate the pagan rite called “Kolyadki” in the village of Osovo, east of Minsk, January 7, 2015. Kolyada is a pagan winter holiday, which over the centuries has merged with Orthodox Christmas celebrations in Ukraine and some parts of Belarus. (Photo by Vasily Fedosenko/Reuters)

Members of the press, including NBC's Evan Dixon, face the blowing snow caused by Marine One as it landed on the South Lawn before picking up U.S. President Barack Obama at the White House in Washington, January 7, 2015. Obama is departing for a two-day trip to Michigan and Arizona. (Photo by Larry Downing/Reuters)

A worker monitors a process inside the plant at the copper refinery of Codelco Ventanas in Ventanas city, northwest of Santiago January 7, 2015. (Photo by Rodrigo Garrido/Reuters)

Elina Svitolina of Ukraine celebrates her women's quarter final win over Angelique Kerber of Germany at the Brisbane International tennis tournament January 8, 2015. (Photo by Jason Reed/Reuters)

A Sadhu or a Hindu holy man, smokes cannabis inside a makeshift shelter on the banks of river Ganges, on his way to an annual trip to Sagar Island, in Kolkata January 8, 2015. Hindu monks and pilgrims are making the annual trip to Sagar Island for a holy dip at the confluence of the Ganges river and the Bay of Bengal on January 14. (Photo by Rupak De Chowdhuri/Reuters)

Civilians and members of the Syrian Arab Red Crescent play with snow in the Duma neighbourhood of Damascus January 7, 2015. A storm buffeted the Middle East with blizzards, rain and strong winds on Wednesday, keeping people at home across the region and raising concerns for Syrian refugees facing freezing temperatures in flimsy shelters. Picture taken January 7, 2015. (Photo by Badra Mamet/Reuters)

People look at a loaded truck that got stuck in a sinkhole on a road in Guilin, Guangxi Zhuang Autonomous Region, January 7, 2015. No injury was reported, according to local media. (Photo by Reuters/Stringer)

An Afghan man kicks a poster of Pakistani religious leader Maulana Fazlur Rehman during a demonstration against his visit in Kabul, January 8, 2015. (Photo by Omar Sobhani/Reuters)

A woman holding a pen cries as she gathers in front of the Notre Dame Cathedral in Paris January 8, 2015 during a minute of silence for victims of the shooting at the Paris offices of weekly satirical newspaper Charlie Hebdo on Wednesday. France began a day of mourning for the journalists and police officers shot dead on Wednesday morning by black-hooded gunmen using Kalashnikov assault rifles. (Photo by Jacky Naegelen/Reuters)

Estonian National Ballet cast members perform during a rehearsal of The Nutcracker by Tchaikovsky at the Maestranza theatre in the Andalusian capital of Seville January 8, 2015. The show will run from January 8-11. (Photo by Marcelo del Pozo/Reuters)

Osmayra Casero Copello (2nd L), directress of the folkloric group Bembe Ach, smokes a cigar along a highway sidewalk as her group members prepare their makeup on their way downtown to perform their show, in the outskirts of Havana January 8, 2015. (Photo by Alexandre Meneghini/Reuters)

Labourers carry bricks at a brick factory on the outskirts of Agartala, capital of India's northeastern state of Tripura, January 7, 2015. A weak recovery from India's longest growth slowdown in decades is pushing Prime Minister Narendra Modi's advisers to consider loosening fiscal deficit targets, risking the ire of investors, ratings agencies and the central bank. (Photo by Jayanta Dey/Reuters)

A crew member stands in the door of Air Force One waiting for the passenger stairs, upon the arrival of U.S. President Barack Obama at Joint Base Andrews in Washington January 8, 2015. Obama returned from a two-day trip to Michigan and Arizona. (Photo by Kevin Lamarque/Reuters)

Emiliano Zapata Elementary students study on the streets in a nearby neighborhood in Chilpancingo, Guerrero, Mexico January 8, 2015. Teachers from the school, which has over 200 matriculating students, have been teaching students from various locations since December 2013 after Hurricane Manuel damaged the school building. With low funds, recently teachers turned to the streets to raise attendance as students found classes easier to access, the school said. (Photo by Jorge Dan Lopez/Reuters)

A teacher (C) from Emiliano Zapata Elementary School teaches students on the street in a nearby neighborhood in Chilpancingo, Guerrero January 8, 2015. (Photo by Jorge Dan Lopez/Reuters)

Brian Gracia, 11, dressed as revolutionary leader Ernesto “Che” Guevara, watches a convoy of military trucks, re-enacting the triumphal 1959 march into Havana by Fidel Castro and his “Barbudos” (bearded) guerrillas, in Havana, January 8, 2015. (Photo by Reuters/Stringer)

Children cheer and wave with a placard of Cuba's former President Fidel Castro (L) and his brother Cuba's President Raul Castro, as they watch a convoy of military trucks, re-enacting the triumphal 1959 march into Havana by Fidel and his “Barbudos” (bearded) guerrillas, driving past in Havana, January 8, 2015. (Photo by Reuters/Stringer)