When the CIA are scanning Al-Mihdhar's travel documents, his ticket shows the airline to be Dubai Airways. No such airline existed at the time.
At the border crossing in Washington, a Chrysler sedan has an Ontario license plate beginning with three numbers. Ontario plates begin with four letters.
The border guards in Washington in 1999 have Department of Homeland Security patches on their uniforms, despite the agency not having been created yet (it would assume operations in 2003).