Is 'By 9:20, Indianapolis Center learned that there were other hijacked aircraft, and began to doubt its initial assumption that American 77 had crashed.' a logical precursor to the hypothesis 'People began thinking that American 77 was the plane which was hijacked.'
By 9:20, Indianapolis Center learned that there were other hijacked aircraft, and began to doubt its initial assumption that American 77 had crashed.###People began thinking that American 77 was the plane which was hijacked.