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

Some of these men later joined the Stauffenberg group and around 200 people who were involved in the plot of July 20th 1944 were killed in its aftermath.

ECONOMIST: The yoof of yesterday

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