“The report implied that because Weapon 2 landed in a free-fall, without the parachute operating, the timer did not initiate the bomb’s high voltage battery (“trajectory arming”), a step in the arming sequence,” Burr wrote. “For Weapon 2, the Arm/Safe switch was in the “safe” position, yet it was virtually armed because the impact shock had rotated the indicator drum to the “armed” position. But the shock also damaged the switch contacts, which had to be intact for the weapon to detonate.”
“Perhaps this is what Secretary of Defense Robert McNamara had in mind, a few years later, when he observed that, ‘by the slightest margin of chance, literally the failure of two wires to cross, a nuclear explosion was averted.'”
Three U.S. Air Force personnel in the B-52 died after the plane broke up that day. They were Sgt. Francis Roger Barnish, Maj. Eugene Holcombe Richards, and Maj. Eugene Shelton.