UFC Fighter Nate Diaz conducts an MMA seminar at US Blackbelt Academy in Laguna Niguel, CA on June 7th, 2013. Film maker Jeff Dojillo interviews USBA Founder and CEO Ivan Kravitz where he discusses how Gracie Jiu-Jitsu has influenced MMA over the years, and also touches on his relationship with Nate Diaz, Royce Gracie, and Muay Thai star Joe Schilling.

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