A nurse checks a premature baby in an incubator at the child care unit of a hospital in Sanaa, Yemen January 16, 2018. REUTERS/Khaled Abdullah

North Korean leader Kim Jong Un visits the newly-remodeled Pyongyang Teacher Training College, in this photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on January 17, 2018.

A fox walks past 10 Downing Street in London, Britain January 16, 2018. REUTERS/Hannah McKay

Dr. Larry Nassar, a former team USA Gymnastics doctor who pleaded guilty in November 2017 to sexual assault charges, listens to a victim during his sentencing hearing in Lansing, Michigan, U.S., January 16, 2018. REUTERS/Brendan McDermid

Tennis - Australian Open - Rod Laver Arena, Melbourne, Australia, January 16, 2018. Alexander Zverev of Germany in action against Thomas Fabbiano of Italy.

Former White House Chief Strategist Stephen Bannon arrives for an interview by the House Intelligence Committee investigating alleged Russian interference in the 2016 U.S. election on Capitol Hill in Washington, U.S., January 16, 2018.

Tennis - Australian Open - Melbourne, Australia, January 16, 2018. A tennis fan is pictured. REUTERS/Toru Hanai

A crocodile that has had a motorcycle tyre arouund its neck for at least 2 years, sunbaths on a beach in Palu City, Central Sulawesi, Indonesia, January 16, 2018 in this photo taken by Antara Foto. Antara Foto/Mohamad Hamzah/ via REUTERS

Devotees offer prayers before taking a holy bath in the Bagmati River at Pashupatinath Temple during the Swasthani Brata Katha festival in Kathmandu, Nepal, January 16, 2018. REUTERS/Navesh Chitrakar

A worker pretends to remove a Carillion logo at the site office of a construction project in central London, Britain, January 16, 2018. REUTERS/Simon Dawson

Riot policemen block access at a camp of supporters of Ukrainian opposition figure and Georgian former President Mikheil Saakashvili near the Parliament building in Kiev, Ukraine January 16, 2018. REUTERS/Maksym Tebukhukhov

Visitors are seen at the exhibition "What Were You Wearing?" that showcases the stories of U.S. student rape victims through representations of the outfits they wore during their assault, in the Brussels district of Molenbeek, Belgium January 16, 2018. REUTERS/Francois Lenoir

A murmuration of migrating starlings is seen across the sky near the village of Beit Kama in southern Israel January 16, 2018. REUTERS/Amir Cohen

Pope Francis is greeted by Jeannette Zurita,representative of prisoners, at the San Joaquin women's prison in Santiago, Chile, January 16, 2018.

A giraffe is seen during a photocall for the presentation of the 42nd International festival circus of Monte Carlo in Monaco, January 16, 2018.

Handball - Men's EHF European Handball Championship - preliminary round Group B - France v Belarus - Zatika Sports Centre, Porec, Croatia - January 16, 2018. Luc Abalo of France and goalkeeper Viachaslau Saldatsenka of Belarus in action. REUTERS/Antonio Bronic