The San Francisco crash of Asiana 214 during perfect VMC conditions (but with the ILS out of service) has prompted many questions. The answers have prompted many more questions about why the Boeing 777 was allowed to crash at all.
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...