A hippopotamus is sprayed with water on a hot summer day at Anna National Zoological Park in Chennai, India on April 26, 2017. (Photo by Arun Sankar/AFP Photo)
Cuban soldiers receive combat training at the Cadets School “Antonio Maceo” November 28, 2001, 30 kilometers East of Havana. (Photo by Jorge Rey/Getty Images)
Festival goers on the first day of the Glastonbury Festival at Worthy Farm in Somerset, Britain on June 26, 2019. Glastonbury Festival of Contemporary Performing Arts is a five-day festival of contemporary performing arts that takes place in Pilton, Somerset, west England, from 26 to 30 June 2019. (Photo by Yui Mok/PA Images via Getty Images)
A Darjeeling Himalayan Railway steam train, which runs on a 2 foot gauge railway and is a UNESCO World Heritage Site, passes by a market in Ghum, India, June 27, 2019. (Photo by Ranita Roy/Reuters)