If they had used both bombs

Point of Divergence
In OTL, Colonel Claus von Stauffenburg and Leutnant Werner von Haeften, were interrupted when they were preparing

the bombs to assassinate the Fuhrer, Adolf Hitler, and so managed to only prime one of the bombs. For reasons that we will never know, they only took the primed bomb into the briefing. When the briefcase was inadvertently placed behind a thick oak table leg, Hitler was shielded from the worst of the blast. But what if they had placed the second, unprimed bomb into the briefcase? The explosion from the first would have set off the second, and produced a powerful enough blast to kill everyone in the room.