A picture made available on 13 May 2016 shows A Tiwa girl performing her traditional dance as they celebrated the Wanchuwa festival in Karbi Anglong District of Assam state, India, 11 May 2016. Wanchuwa is one of the most important festivals of the Tiwa tribal community living in the hills as it is related with agriculture which is the mainstay of their economy. Tiwas pray for a bountiful harvest during this festival and to protect their crops from pest and other natural calamities. Tiwa is a major tribe of Assam state who practice Jhum or shifting cultivation for their living in the hills. (Photo by EPA/Stringer)

Armed forces veteran Frank Simpson at the Portico library being camouflaged by body artist Carolyn Roper in Manchester, UK on May 16, 2016 as part of the #CountThemIn campaign launched on Monday by the Royal British Legion. (Photo by Jon Super/Royal British Legion/PA Wire)

Riot police stand guard behind a fire as refinery workers hold a blockade of the oil depot of Douchy-Les-Mines to protest against the government's proposed labour reforms, on May 25, 2016. Refinery workers stepped up strikes that threaten to paralyse France weeks ahead of the Euro 2016 tournament as the government moved to break their blockades, escalating a three-month tug-of-war over labour reforms. (Photo by François L.O./AFP Photo)

A tank crew competes in an individual race at a regional stage of the 2016 Tank Biathlon Competition at the Anastasyevsky training ground, March 1, 2016, Khabarovsk Territory, Russia. (Photo by Yuri Smityuk/TASS/Newscom)

The Proton rocket, that will launch the ExoMars 2016 spacecraft to Mars, is transfered to the launchpad at the Baikonur cosmodrome, Kazakhstan, in this handout photo released by European Space Agency (ESA) on March 11, 2016. (Photo by Stephane Corvaja/Reuters/ESA)

A girl collects drinking water at Dala river outside Yangon, Myanmar March 3, 2016. Some 650 million people, or one in 10 of the world's population, have no access to safe water, putting them at risk of infectious diseases and premature death. Dirty water and poor sanitation can cause severe diarrhoeal diseases in children, killing 900 under-five a day across the world, according to United Nations estimates. (Photo by Soe Zeya Tun/Reuters)

One of Jesus' disciples is dunked in a fountain during The Wintershall's “The Passion of Jesus” in front of crowds on Good Friday at Trafalgar Square on March 25, 2016 in London, England. (Photo by Chris Ratcliffe/Getty Images)

Attendees engage in cosplay and wearing costumes during WonderCon 2016 Day 2 at Los Angeles Convention Center on March 25, 2016 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)