Richard "Mack" Machowicz, an ex-Navy SEAL and former host of the cable-TV series Future Weapons, as well as a student of taekwondo, muay Thai, kali, boxing, Brazilian jiu-jitsu and Paul Vunak's jeet kune do, discusses the principles applied to produce reliable results in combat (and in life itself) during this exclusive footage from the cover shoot for the June 2010 issue of Black Belt.


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