People fish for trout through holes in a frozen river in Hwacheon, south of the demilitarized zone (DMZ) separating the two Koreas, January 14, 2017. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY - RTSVH2M

Taiwan President Tsai Ing-wen smiles from her motorcade as she leaves to a meeting at Twitter during a stop-over after her visit to Latin America in Burlingame, California, U.S., January 14, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY - RTSVJY4

A commuter jumps between trains upon arrival at a station, to attend Akheri Munajat, the final supplication during Biswa Ijtema in Tongi, on the outskirts of Dhaka January 15, 2017. REUTERS/Mohammad Ponir Hossain TPX IMAGES OF THE DAY - RTSVKTA

A military band passes stand-ins for President-elect Donald Trump, and his wife Melania (L) and Vice President-elect Mike Pence and his wife Karen (R) during a rehearsal for the inauguration on the East Front of the U.S. Capitol in Washington, U.S. January 15, 2017. From L-R are SGM Gregory Lowery, SPC Sara Corry, Maj. Gen. Bradley Becker, MSG Neil Ewachiw and MSG Leigh Ann Hinton. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY - RTSVNHQ

A group of cross-country skiers enjoy a cold and sunny winter's day at the Champ du Feu near Strasbourg, France, January 16, 2017. REUTERS/Christian Hartmann TPX IMAGES OF THE DAY - RTSVRHN

Thailand's Prime Minister Prayuth Chano-cha punchs during the Children's Day celebration at Government House in Bangkok, Thailand, January 14, 2017. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY - RTSVH60

SpaceX Falcon rocket lifts off from Space Launch Complex 4E at Vandenberg Air Force Base, California, U.S., January 14, 2017. REUTERS/Gene Blevins TPX IMAGES OF THE DAY - RTSVK0X

A visitor feeds a food pellet to a giraffe in the Giraffe Centre in Nairobi, Kenya January 15, 2017. REUTERS/Goran Tomasevic TPX IMAGES OF THE DAY - RTSVMVB

Displaced people, who fled Islamic State militants, cross the bridge in Al-Muthanna neighborhood of Mosul, Iraq, January 15, 2017. REUTERS/Ahmed Saad TPX IMAGES OF THE DAY - RTSVMWT

U.S. President-elect Donald Trump shakes hands with Martin Luther King III, an American human rights advocate, at Trump Tower in Manhattan, New York City, U.S., January 16, 2017. REUTERS/Alex Wroblewski TPX IMAGES OF THE DAY - RTSVSHJ

A member of Iraqi Special Operations Forces (ISOF) rests at the University of Mosul during a battle with Islamic State militants, in Mosul, Iraq, January 14, 2017. REUTERS/Ahmed Saad TPX IMAGES OF THE DAY - RTSVHWY

Ethnic Wa performers dressed as United Wa State Army (UWSA) soldiers perform a traditional dance at Mongmao, Wa territory in north east Myanmar October 1, 2016. Picture taken on October 1, 2016. REUTERS/Soe Zeya Tun TPX IMAGES OF THE DAY - RTSVK9M

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATHA rebel fighter carries an injured boy after a car bomb explosion in Jub al Barazi east of the northern Syrian town of al-Bab, Syria January 15, 2017. REUTERS/Khalil Ashawi TEMPLATE OUT TPX IMAGES OF THE DAY - RTSVMJR

Facebook's campus is seen in this aerial photo on the edge of the San Francisco Bay in Menlo Park, California, U.S. on January 13, 2017. Picture taken on January 13, 2017. REUTERS/Noah Berger TPX IMAGES OF THE DAY - RTSVNHX

U.S. army soldiers attend an official welcoming ceremony for U.S. troops deployed to Poland as part of NATO build-up in Eastern Europe in Zagan, Poland, January 14, 2017. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY - RTSVJLW

A wax figure of President Bill Clinton is displayed at the Hall of Presidents Museum, which closed in November, during an auction today in Gettysburg, Pennsylvania, U.S. January 14, 2017. REUTERS/Mark Makela - RTSVKG2

Alpine Skiing - FIS Alpine Skiing World Cup - Women's Downhill - Altenmarkt-Zauchensee, Austria - 15/01/17 - Christine Scheyer of Austria in action. REUTERS/Dominic Ebenbichler TPX IMAGES OF THE DAY - RTSVLFT

A general view shows the congress center of the annual meeting of the World Economic Forum (WEF) in Davos, Switzerland January 15, 2017. REUTERS/Ruben Sprich TPX IMAGES OF THE DAY - RTSVNHT

A man covers his head walks on a hilltop on a snowy day in Kabul, Afghanistan January 14, 2017. REUTERS/Mohammad Ismail TPX IMAGES OF THE DAY - RTSVHMH

Kandy Freeman participates in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. REUTERS/Stephanie Keith TPX IMAGES OF THE DAY - RTSVJX3

Secretary of State John Kerry, left, talks with Vo Van Tam, 70, second from right, who was a former Viet Cong guerrilla, who took part in the attack on Kerry's Swift Boat in Feb. 28, 1969, while on a tour of the region Saturday, Jan. 14, 2017 in the Mekong River Delta, Vietnam. Kerry once patrolled these waters on a U.S. naval gunboat and received the Silver Star for his actions. REUTERS/Alex Brandon/Pool TPX IMAGES OF THE DAY - RTSVKSR

People demonstrate for the Affordable Care Act and against Trump during the First Stand Rally in Newark, N.J., U.S. January 15, 2017. REUTERS/Stephanie Keith - RTSVN4Q

Iraqi Special Operations Forces (ISOF) react after a car bomb exploded during an operation to clear the al-Andalus district of Islamic State militants, in Mosul, Iraq, January 16, 2017. REUTERS/Muhammad Hamed TPX IMAGES OF THE DAY - RTSVRBH