An 'Armageddon' program designed to ensure that the federal government would continue to function in the aftermath of a nuclear war was put into place during the September 11, 2001 terrorist attacks.According to ABC's Nightline, which plans to report its findings tonight, every federal agency shifted its control to an alternate quarters outside Washington.President Bush's decision to fly to Nebraska that day instead of returning to the White House, which drew some criticism at the time, was part of that plan. Nightline expands on a book by James Mann that detailed the birth of the program, named 'Continuity of Government,'...