Detroit Derby Girls Travel Team warms up before battling The Chicago Outfit Syndicate during a women's...
The wheels on a roller skate are pictured as a member of the Detroit Derby Girls Travel Team warms up before battling The Chicago Outfit Syndicate during a women's flat track roller derby bout in Detroit, Michigan April 2, 2011. Picture taken April 2, 2011. REUTERS/Eric Thayer (UNITED STATES - Tags: SOCIETY SPORT)