For Nearly Two Decades the Nuclear Launch Code at all Minuteman Silos in the United States Was 00000000
"For 20 years the password for the U.S. nuclear arsenal was '00000000.' Kennedy instituted a security system on all nuclear warheads to prevent them from being armed by someone unauthorized. It was called PAL, and promised to secure the entire US arsenal around the world. Unfortunately for Kennedy (and I guess, the whole world) U.S. military leadership was more concerned about delaying a launch than securing Armageddon. They technically obeyed the order but then set the password to 8 Zeros, or '00000000'."
On my old house alarm if I punched in all zeros it was a silent alarm to tell the cops you were being held hostage and forced to shut of the alarm. If bad guys had somehow captured a minuteman silo whoud they figure out all zeros is the real launch code?