What is frank dux?

Here's some information about Frank Dux in Markdown format, with linked key subjects:

Frank Dux is a martial artist who claims to have won the kumite, a full-contact martial arts tournament. He gained widespread recognition (and later, significant controversy) due to his claims of exploits outlined in a Black Belt magazine article in 1980 and the subsequent film Bloodsport (1988), which was based on his purported experiences.

However, Dux's claims have been widely disputed and discredited by various sources. Investigative reporting, including a piece by Los Angeles Times writer John Johnson, revealed inconsistencies and fabrications in his narratives. There's no independent verification of his participation in or victory at any legitimate kumite. His military service records have also been questioned.

Despite the controversy, Dux has continued to maintain his version of events and has worked as a martial arts instructor and choreographer.