NOT SINCE 9/11 . . .One evening in the midst of prime-time programming, networks worldwide interrupt to announce that Air Force Two, a Boeing 747 carrying the Vice President and Secretary of State of the USA, has disappeared after leaving Honolulu, Hawaii on a flight to Hong Kong. An extensive search and rescue effort will soon be underway. President William Henry Harrison IV hears the news aboard Air Force One as he flies with his wife and children...