On this date in 1962, prison officials at Alcatraz discovered that inmates Frank Morris, and brothers John and Clarence Anglin had apparently escaped from the federal prison. The escape took over two years to plan and execute. The escapees used stolen materials to make a raft to escape on and dummies to place in their bunks. They tunneled from their cells into the prison ventilation shaft, through which they climbed up to the roof of the prison. They climbed down from the roof, made it to the water, and paddled away on their homemade raft. The men were never found and were presumed drowned in San Francisco Bay.
FBI Files: Alcatraz Escape
IMDb: Escape from Alcatraz