Passage: After several unsuccessful tries by Stauffenberg to meet Hitler, Göring and Himmler when they were together, he went ahead with the attempt at Wolfsschanze on 20 July 1944. Stauffenberg entered the briefing room carrying a briefcase containing two small bombs. The location had unexpectedly been changed from the subterranean Führerbunker to Albert Speer's wooden hut due to it being a hot summer's day. He left the room to arm the first bomb with specially adapted pliers, a task made difficult because he had lost his right hand and had only three fingers on his left. A guard knocked and opened the door, urging him to hurry as the meeting was about to begin. As a result, Stauffenberg was able to arm only one of the bombs. He left the second bomb with his aide-de-camp, Werner von Haeften, and returned to the briefing room, where he placed the briefcase under the conference table, as close as he could to Hitler. Some minutes later, he excused himself and left the room. After his exit, the briefcase was moved by Colonel Heinz Brandt.When the explosion tore through the hut, Stauffenberg was convinced that no one in the room could have survived. Although four people were killed and almost all survivors were injured, Hitler himself was shielded from the blast by the heavy, solid-oak conference table leg, which Colonel Brandt had placed the briefcase bomb behind, and was only slightly wounded.Stauffenberg and Haeften quickly left and drove to the nearby airfield. After his return to Berlin, Stauffenberg immediately began to motivate his friends to initiate the second phase: the military coup against the Nazi leaders. When Joseph Goebbels announced by radio that Hitler had survived and later, after Hitler spoke on the state radio, the conspirators realised that the coup had failed. They were tracked to their Bendlerstrasse offices and overpowered after a brief shoot-out, during which Stauffenberg was wounded in the shoulder.

Question: What happened to the coup?
failed