A Saudi soldier fires a mortar towards Houthi movement position, at the Saudi border with Yemen April 21, 2015. (Photo by Reuters/Stringer)

Soldiers take part in a drill during a heavy snow in Heihe, Heilongjiang province, February 26, 2014. (Photo by Reuters/China Daily)

A South Korean soldier wear North Korea's military uniform, acting as North Korean soldier during an anti-terror and anti-chemical drill session held as part of the 2011 Ulchi Freedom Guardian (UFG) event on August 17, 2011 in Seoul, South Korea. The 11-day UGC, which features drills including the handling of chemical and biological attacks, is a regular joint exercise between US and South Korean troops to prepare for potential emergencies on the Korean Peninsula. (Photo by Chung Sung-Jun/Getty Images)

The faces of war have been brought back to life after a series of World War One photographs were expertly colourised. The black and white snaps were painstakingly restored and colourised by photographer Mario Unger (53) from Rotenturm, Austria. Here: One image shows an unidentified American soldier posing with a pistol, helmet, and Iron Cross medal taken from a German soldier, 1918. (Photo by Mario Unger/Mediadrumworld)

In this Monday, September 23, 2019, a woman waits for alms as she sits with her child in a street on the outskirts of Kabul, Afghanistan. (Photo by Ebrahim Noroozi/AP Photo)

A child plays beside an idol of the Hindu god Ganesh, the deity of prosperity, the day after it was immersed in the Yamuna river for the Ganesh Chaturthi festival in Delhi, India September 6, 2017. (Photo by Cathal McNaughton/Reuters)

A child stands inside a large soap bubble made by a street artist at the Mayor square in central Madrid, Friday, December 9, 2016. (Photo by Francisco Seco/AP Photo)

A child looks at a polar bear swimming under a water in its enclosure on a hot summer day at Prague Zoo, Czech Republic, July 30, 2015. (Photo by David W. Cerny/Reuters)