This undated portrait shows Emmett Louis Till, who was kidnapped, tortured and killed in the Mississippi Delta in August 1955 after witnesses said he whistled at a white woman working in a store. The House has unanimously passed a bill posthumously awarding the Congressional Gold Medal to Emmett Till, the Chicago teenager murdered by white supremacists in the 1950s, and his mother, Mamie Till-Mobley. The bill is meant to honor Till and his mother with the highest civilian honor that Congress awards. (AP Photo/File)