A modified version of the Boeing 747 plane specially designed to protect the U.S. president and Joint Chiefs in the event of a nuclear war or a powerful meteor strike by keeping them in the air for days without refueling and out of danger.

Codenamed E-4B, the doomsday plane can travel at speeds up to 620 miles per hour, 40 miles per hour faster than their commercial counterparts. The flight team for the E-4B sleeps nearby and is ready to scramble in five minutes. It was mobilized in the tumultuous hours after planes crashed into the World Trade Center on 9/11, 2011.