On April 4, 1968, civil rights leader Martin Luther King Jr. was shot and killed in Memphis.
In 1949, 12 nations, including the United States, signed the North Atlantic Treaty in Washington, D.C.On April 4, 1968, civil rights leader Martin Luther King Jr., 39, was shot and killed while standing on a balcony of the Lorraine Motel in Memphis, Tennessee; his slaying was followed by a wave of rioting.In 1973, the twin towers of New York’s World Trade Center were officially dedicated.
John Heinz, R-Pa., and six other people, including two children, were killed when a helicopter collided with Heinz’s plane over a schoolyard in Merion, Pennsylvania.In 2011, yielding to political opposition, the Obama administration gave up on trying avowed Sept. 11 mastermind Khalid Sheik Mohammed and four alleged co-conspirators in civilian federal courts and said it would prosecute them instead before military commissions.