FAQ

The real Frank Dux claims he was recruited by the CIA to work undercover in Southeast Asia and received a medal of honor for his services. His military records, however, show he was never sent overseas and has not received any awards. He has been accused of falsifying his military service by authors B. G. Burkett, Ralph Keyes and Nigel West, and his claim to have worked for the CIA has been dismissed by Director of Central Intelligence Robert Gates, General Norman Schwarzkopf Jr., Major General John K. Singlaub, and Soldier of Fortune magazine.

The invitation is for people said to have skill. The qualifier makes them prove it.

The character the film was based on claimed to be trained in ninjitsu. However, in the training sequences, he appeared to be learning judo, kendo, muay thai, along with fictional martial arts.