The U.S. government's doomsday plan to protect itself -- but probably not you

For the last 60 years, the U.S. government has kept up a multi-billion dollar program to save people and retaliate after a major attack, like a nuclear strike from a foreign enemy. The idea is to evacuate people to secret bunkers until they can reemerge and rebuild the U.S. But the government doesn’t plan to save everyone.