An Afghan National Army soldier firing an RPG-7 rocket-propelled grenade launcher during a live-fire exercise at Camp Shorabak, Helmand, Afghanistan, on May 20, 2013. Designed by the Soviet Union and first used in 1961, the RPG-7 is now produced in nine countries. Several variants are available, including a paratrooper model and a lighter Chinese version. The RPG-7 has become the most widely used anti-armor weapon in the world.Photograph: Ezekiel Kitandwe/US Marines