A hawk owl sits on a fir branch near the village of Vasilkova, Belarus January 9, 2017. REUTERS/Vasily Fedosenko TPX IMAGES OF THE DAY - RTX2Y5X2

Protesters dressed as Klansmen disrupt the start of a Senate Judiciary Committee confirmation hearing for U.S. Attorney General-nominee Sen. Jeff Sessions (R) on Capitol Hill in Washington, U.S., January 10, 2017. REUTERS/Kevin Lamarque - RTX2YBJZ

A Palestinian woman uses a candle light as she washes up in her kitchen during a power cut inside her house in Beit Lahiya in the northern Gaza Strip January 11, 2017. Picture taken January 11, 2017. REUTERS/Mohammed Salem - RTX2YND8

A man makes his way atop the Pnyka hill following a snowfall in Athens, Greece, January 10, 2017. REUTERS/Alkis Konstantinidis - RTX2Y9I7

U.S. President Barack Obama acknowledges the crowd as he arrives to deliver his farewell address in Chicago, Illinois, U.S., January 10, 2017. REUTERS/John Gress TPX IMAGES OF THE DAY - RTX2YEO3

Iraqi army members clash with Islamic State militants from the roof of a building, eastern Mosul, Iraq, January 12, 2017. REUTERS/Alaa Al-Marjani - RTX2YNU8

Members of the Iraqi rapid response forces fire missile toward Islamic State militants during a battle between Iraqi forces and Islamic State militants in Somer district of eastern Mosul, Iraq January 11, 2017. REUTERS/Alaa Al-Marjani - RTX2YHW0

Commuters sit on a bus on Westminster Bridge during a strike on the Underground by members of two unions in protest at ticket office closures and reduced staffing levels, in London, Britain January 9, 2017. REUTERS/Toby Melville - RTX2Y385

Iraqi people, who are fleeing from clashes, walk with their children during a battle with Islamic State militants, eastern Mosul, Iraq, January 12, 2017. REUTERS/Alaa Al-Marjani - RTX2YNS9

Steam rises from chimneys of a heating power plant near a monument of Soviet cosmonaut Yuri Gagarin, the first man in space, with the air temperature at about minus 17 degrees Celsius (1.4 degrees Fahrenheit), during sunset in Moscow, Russia, January 9, 2017. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY - RTX2Y4ZD

A Free Syrian Army (FSA) fighter reacts as he mourns near the body of his brother, who was an FSA fighter and died during an offensive against Islamic State fighters to take control of Qabasin town, on the outskirts of the northern Syrian town of al-Bab, Syria January 10, 2017. REUTERS/Khalil Ashawi TPX IMAGES OF THE DAY - RTX2YBUK

A man and his dog stop to look at a mural depicting Princess Leia from the film Star Wars played by Carrie Fisher in Belfast, Northern Ireland January 11, 2017. REUTERS/Clodagh Kilcoyne TPX IMAGES OF THE DAY - RTX2YHXM

A dog is pictured in a cage at a dog meat farm in Wonju, South Korea, January 10, 2017. REUTERS/Kim Hong-Ji - RTX2Y940

Migrants warm themselves by the fire inside a derelict customs warehouse in Belgrade, Serbia, January 11, 2017. REUTERS/Marko Djurica - RTX2YHV9

An Iraqi soldier holds an Islamic State flag from a building, during a battle with Islamic State militants in Al-shuqaq neighbourhood north of Mosul, Iraq, January 9, 2017. REUTERS/Ari Jalal - RTX2Y5PF

A man climbs an artificial wall of ice in the city of Liberec, Czech Republic, January 12, 2017. REUTERS/David W Cerny TPX IMAGES OF THE DAY - RTX2YOLG