1972: In an event that would become known as Bloody Sunday, British paratroopers shoot 26 unarmed civil-rights protesters and bystanders during a civil rights march in Derry, Northern Ireland. Of those shot, 13 died immediately or soon after and another person died later from injuries he received that day. An initial investigation cleared the soldiers and British authorities, but was widely criticized. A new inquiry began in 1998 and in 2010 concluded that the soldiers had "lost control" and concocted lies to cover up their actions, calling the killings "unjustified and unjustifiable." Pictured here is a mural in Derry depicting a famous photo from Bloody Sunday of the Rev. Edward Daly escorting injured marchers to safety using a white handkerchief.