A launch code that would have sent Hundreds of U.S. nuclear missile into the air was set to 00000000.

Secretary of Defense, Robert McNamara, ordered the military to install an extra set of numbers, which only a higher authority could use to turn the system on and arm the nukes. Until 1977, this very important code that was meant to prevent the accidental or unauthorized launch of U.S. nuclear weapons was set to 00000000.