The Villarrica Volcano is seen at night from Pucon town, Chile, July 12, 2015. Villarrica, located near the popular tourist resort of Pucon, is among the most active volcanoes in South America. (Photo by Cristobal Saavedra/Reuters)

Saraa Mutawkil (R), 18, practises boxing at Al Rabie club in Omdurman May 10, 2016. (Photo by Mohamed Nureldin Abdallah/Reuters)

Shokyo Miura, a Buddhist monk and one of the on-site priests, poses for pictures outside Tera Cafe in Tokyo, Japan, April 1, 2016. At first glance, the cafe, which also serves alcohol, looks like any other except for an altar next to the countertop bar with a Buddha statue set against a gold backdrop. The menu confirms this is something different. It lists classes for 1,500 yen ($14) in weaving prayer beads, calligraphy with sutras, or lines of scripture, and consultations with a Buddhist priest. (Photo by Yuya Shino/Reuters)

A hot air balloon flies close to the ground in the Jezreel Valley in northern Israel during an international hot air balloon festival October 14, 2014. (Photo by Nir Elias/Reuters)

A member of the mainly Christian “anti-balaka” (anti-machete) militia trains in the Boeing neighbourhood of Bangui, Central African Republic, on February 24, 2014. (Photo by Fred Dufour/AFP Photo)

Zhao Qiang walks across a street in Shenyang, Liaoning province, April 14, 2014. Zhao, a community officer of the China Disabled Persons' Federation, was diagnosed with multiple when he was two, with the resulting tumour affecting the growth of his left leg, his grandmother told local media, citing a doctor's diagnosis. His uncle modified his shoes, fitting them with stools, to allow Zhao to stand and walk. (Photo by Reuters/Stringer)

A hairdressing mannequin is seen outside a hair salon amid as Typhoon Matmo hits Nantong, Jiangsu province July 25, 2014. Matmo, which made landfall in Fujian Province on Wednesday, has brought strong winds and heavy downpours to more areas in China after it moved northward on Thursday, Xinhua News Agency reported. (Photo by Reuters/Stringer)

A member of the Eton public school O.T.C. (Officers Training Corps) practising shouting out orders during a training session, 20th January 1940. (Photo by Hulton Archive/Getty Images)