On 9 March 1944, Busch and his aides were summoned to brief Hitler at the Berghof in Bavaria on 11 March. Following a debate with Tresckow, Breitenbuch agreed to attempt to assassinate the Führer by shooting him in the head[1] using a 7.65mm Browning pistol concealed in his trouser pocket, having declined a suicide attempt using a bomb. A Condor aircraft was sent to collect Busch and Breitenbuch and he was allowed into the Berghof, but was not able to carry out the plan because SS guards had been ordered - earlier that day - not to permit aides into the conference room with Hitler.[2]