Today in History: November 18: In 1928, “Steamboat Willie,” the first cartoon with synchronized sound as well as the first released of the character Mickey Mouse, debuted on screen at the Colony Theater in New York. In 1978, U.S. Rep. Leo J. Ryan of California and four others were killed on an airstrip in Jonestown, Guyana by members of the Peoples Temple; the killings were followed by a night of mass murder and suicide resulting in the deaths of more than 900 cult members. In 1991, Shiite Muslim kidnappers in Lebanon freed Anglican Church envoy Terry Waite and Thomas Sutherland, the American dean of agriculture at the American University of Beirut. In 2021, more than half a century after the assassination of Malcolm X, two of his convicted killers were exonerated; a New York judge dismissed the convictions of Muhammad Aziz and the late Khalil Islam after prosecutors and the men’s lawyers said a renewed investigation had found new evidence that undermined the case against them.