WASHINGTON, DC - JANUARY 15: Teams compete in a Roller Derby event at Washington, DC Armory on January 15, 2011 in Washington, DC. The contact sport of Roller Derby involves two teams of four defensive players and one jammer, whose role it is to pass through the pack to count a score.

Photos by Tim Lundin / Freelance / tim@TDLphoto.com - http://TDLphoto.com
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