A rescue worker holds an injured boy after what activists said were airstrikes carried out by the Russian air force in Idlib city, Syria December 20, 2015. (Photo by Ammar Abdullah/Reuters)

The head of a decapitated rooster is pictured after a rooster run, during celebrations in honour of San Juan Bautista in San Juan de Oriente town, Nicaragua, June 26, 2015. The rooster runs, where horse-riders try to pull the head off live roosters, symbolize the beheading of John the Baptist. (Photo by Oswaldo Rivas/Reuters)

A woman takes part in a global March for marijuana in Medellin, Colombia, May 7, 2016. The Global Marijuana March (GMM) is an annual rally held at different locations across the planet. It refers to cannabis-related events that occur on the first Saturday in May, or thereabouts, and may include marches, meetings, rallies, raves, concerts, festivals and information tables. (Photo by Fredy Builes/Reuters)

Boy rests on bags of recyclable waste at a rubbish dump outside Yemen's Red Sea port city of Houdieda January 19, 2016. (Photo by Abduljabbar Zeyad/Reuters)

A woman is tattooed during the Great British Tattoo Show in Alexandra Palace in north London, Britain May 23, 2015. (Photo by Neil Hall/Reuters)

A woman holds her umbrella while walking against strong winds as Typhoon Soudelor approaches Taiwan in Taipei, August 7, 2015. (Photo by Pichi Chuang/Reuters)

A Palestinian boy holds an umbrella as he runs near houses that witnesses said were destroyed or damaged by Israeli shelling during the most recent conflict between Israel and Hamas, on a rainy day in the east of Gaza City November 16, 2014. (Photo by Suhaib Salem/Reuters)

Sisters dressed as the Grady twins from the movie "The Shining" pose for a photo inside their house as they take part in the second edition of "Noche del Terror" (Horror night) during Halloween celebrations in the neighborhood of Churriana, near Malaga, southern Spain, October 31, 2015. (Photo by Jon Nazca/Reuters)