Operation Valkyrie
By the time Stauffenberg's aircraft reached Berlin about 16:00, General Erich Fellgiebel, an officer at the who was in on the plot, had phoned the Bendlerblock and told the plotters that Hitler had survived the explosion. As a result, the plot to mobilise Operation Valkyrie would have no chance of succeeding once the officers of the Reserve Army knew that Hitler was alive. There was more confusion when Stauffenberg's aircraft landed and he phoned from the airport to say that Hitler was in fact dead. The Bendlerblock plotters did not know whom to believe.