But when news spread that Hitler had survived, the plot crumbled and von Stauffenberg, von Kleist's father, and scores of others were arrested and executed in an orgy of revenge killings.

NPR: Last Survivor Of Plot To Kill Hitler Dies At 90

Col von Stauffenberg - played by Tom Cruise in the 2008 film of the plot, Valkyrie - placed the bomb in a conference room where Hitler was meeting his officials inside the "Wolf's Lair", Hitler's command post in East Prussia.

BBC: Hitler assassination plotter Von Kleist dies

Col Von Stauffenberg, along with von Kleist's father - a known opponent of Hitler - and others involved in the plot were arrested and later executed.

BBC: Hitler assassination plotter Von Kleist dies