Terrifying History on Instagram: "On February 9, 1956, 96-year-old Samuel J. Seymour made television history as the last surviving eyewitness to Abraham Lincoln’s assassination—appearing on the CBS game show *I’ve Got A Secret* just weeks before his death. As a 5-year-old boy, Seymour had attended Ford’s Theatre on April 14, 1865, where he saw John Wilkes Booth leap to the stage after shooting the president. “I saw Lincoln slumped over in his box seat,” the frail but sharp-minded Seymour recount