Terrorists bring passports on domestic flights??
and drop them out of the plane?
Or maybe it survived the inferno intact?  Maybe its a super passport?


http://www.cnn.com/2001/US/09/16/gen.america.under.attack/

Leaders urge 'normal' Monday after week of terror

Bin Laden denies role in New York, Washington slaughter

September 16, 2001 Posted: 7:07 p.m. EDT (2307 GMT)

In New York, several blocks from the ruins of the World Trade Center, a
passport authorities said belonged to one of the hijackers was discovered a few
days ago, according to city Police Commissioner Bernard Kerik. That has
prompted the FBI and police to widen the search area beyond the immediate
crash site. A second person whom authorities were seeking as a material
witness in the attacks was arrested Saturday and held in FBI custody in New
York, a Justice Department official said. (Full story)