Female members of the Chinese People's Liberation Army (PLA) honour guard stand behind a string to ensure that they are in a straight line before a welcoming ceremony for Russian President Vladimir Putin outside the Great Hall of the People in Beijing, China, June 25, 2016. (Photo by Kim Kyung-Hoon/Reuters)

A young woman holds her smartphone at Red Square with the Kremlin's Spasskaya Tower, right, and St. Basil Cathedral, center, in the background in Moscow, Russia, Monday, July 25, 2016. (Photo by Pavel Golovkin/AP Photo)

A girl gets her arm sketched with a body paint tattoo depicting the traditional Dandiya dance, ahead of Navratri, a festival when devotees worship the Hindu goddess Durga, in Ahmedabad, India, September 25, 2016. (Photo by Amit Dave/Reuters)

A drone flies above World Surf League World Title winner Hawaian surfer John John Florence during the final heat of the Portuguese stage of the World Surf League championship at Supertubos beach near Peniche, central Portugal, on October 25, 2016. (Photo by Francisco Leong/AFP Photo)

Students hold their weapons before the swearing in ceremony for the military students, in Bucharest, Romania, Wednesday, October 25, 2017. The Romanian Army is proudly celebrating their Army Day and marking 100-years since the landmark battle of Marasesti, a key World War I battle in 1917 when Romanian and Russian soldiers defeated German troops, halting a German offensive. (Photo by Vadim Ghirda/AP Photo)

Firefighters pull a pig as they try to rescue it from a well at a pig farm in Huanghua township of Leqing, Zhejiang province, China, April 25, 2014. Seven local firefighters successfully rescued the 300 kg (661 lbs) pig, local media reported. (Photo by Reuters/China Daily)

Guests enjoy a dinner at the table “Santa in the sky” lifted by a crane and elevated at 50 meters in the air and decorated to match the appearance of a “Santa Sleigh”, as part as the Christmas festivities in Brussels, Belgium, November 25, 2016. (Photo by Yves Herman/Reuters)

Jason Ramsay and Amy Laverty, from Arbroth, Scotland, pose beside a large Christmas tree at Bondi Beach on December 25, 2016 in Sydney, Australia. Bondi Beach is a popular tourist destination on Christmas Day. (Photo by Don Arnold/Getty Images)