SPOILER: sent in by Indiana Reader.
Night Fall sees the return of NYPD turned FBI consultant John Corey and his FBI agent wife Kate Mayfield. Kate had worked on the crash of TWA 800 five years ago, and gets Corey interested in the discrepancies between eye witness accounts and the official cause of the "accident."
After much intrique and the reappearance of deceased CIA man and Corey-nemesis Ted Nash, John finally tracks down the only videotape account of the crash, proving what the government has desperately tried to cover up. However, his attempts to confront his detracters with the evidence and a brave eyewitness are thwarted when the "meet" at the Windows of the World Restaurant at the top of World Trade Center North Tower is interrupted by the 9/11 terrorist attacks.
Corey and Kate escape with their lives. Everyone else is supposedly killed in the tower collapses, and the evidence showing the TWA 800 was taken down by a missile attack, is destroyed.