taekwondo Vladimir Putin has been showing off his black belt for years, but no more. He's now beltless Carla Sinclair

martial arts The Art of High Impact Kicking: "The knife edge of the foot is the weapon used" David Pescovitz

martial arts Watch this incredible Taekwondo 720° spinning kick to break four boards David Pescovitz

martial arts Dambe: the Nigerian combat sport Devin Nealy

World Taekwondo Demonstration Team Incredible Taekwondo troupe turns down the Olympics but gives outstanding performance on "America's Got Talent" Carla Sinclair

learning Young taekwondo champ demonstrates her skills Mark Frauenfelder