Sightseeing helicopter tours are an increasingly popular attraction for NYC tourists. However they have also become increasingly unpopular among local residents and politicians, who are calling for them to be banned.
Diane Sawyer gets an unprecedented look inside the E-4B Nightwatch, aka the Doomsday Plane, the 747 built to keep the nation's command and control structure operational from the air if ground bases are rendered useless by a nuc...