![A skater called "Lil Bruiser" from the Junior Arizona Derby Dolls waits to compete at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby A skater called "Lil Bruiser" from the Junior Arizona Derby Dolls waits to compete at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby](https://c8.alamy.com/compfr/2cxe0t7/a-skater-called-lil-bruiser-from-the-junior-arizona-derby-dolls-waits-to-compete-at-the-national-championship-for-banked-track-roller-derby-in-los-angeles-california-june-7-2013-roller-derby-is-a-real-full-contact-sport-played-at-fast-pace-by-all-volunteer-teams-on-a-banked-oval-track-and-was-created-in-1935-by-leo-seltzer-in-chicago-juniors-are-aged-7-16-and-play-on-teams-of-ability-not-age-and-have-feisty-skater-names-such-as-lil-bruiser-ripper-n-half-and-felony-melanie-picture-taken-june-7-2013-reuters-lucy-nicholson-united-states-tags-sport-society-2cxe0t7.jpg)
A skater called "Lil Bruiser" from the Junior Arizona Derby Dolls waits to compete at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby
![Junior skaters from the Arizona Derby Dames and the LA Derby Dolls compete at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby is Junior skaters from the Arizona Derby Dames and the LA Derby Dolls compete at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby is](https://c8.alamy.com/compes/2cxn6ge/junior-skaters-from-the-arizona-derby-dames-and-the-la-derby-dolls-compete-at-the-national-championship-for-banked-track-roller-derby-in-los-angeles-california-june-7-2013-roller-derby-is-a-real-full-contact-sport-played-at-fast-pace-by-all-volunteer-teams-on-a-banked-oval-track-and-was-created-in-1935-by-leo-seltzer-in-chicago-juniors-are-aged-7-16-and-play-on-teams-of-ability-not-age-and-have-feisty-skater-names-such-as-lil-bruiser-ripper-n-half-and-felony-melanie-picture-taken-june-7-2013-reuters-lucy-nicholson-united-states-tags-society-sport-2cxn6ge.jpg)
Junior skaters from the Arizona Derby Dames and the LA Derby Dolls compete at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby is
![Skaters from the Junior LA Derby Dolls take a timeout at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby is a real, full-contact Skaters from the Junior LA Derby Dolls take a timeout at the National Championship for Banked Track Roller Derby in Los Angeles, California, June 7, 2013. Roller derby is a real, full-contact](https://c8.alamy.com/compes/2cxn6g9/skaters-from-the-junior-la-derby-dolls-take-a-timeout-at-the-national-championship-for-banked-track-roller-derby-in-los-angeles-california-june-7-2013-roller-derby-is-a-real-full-contact-sport-played-at-fast-pace-by-all-volunteer-teams-on-a-banked-oval-track-and-was-created-in-1935-by-leo-seltzer-in-chicago-juniors-are-aged-7-16-and-play-on-teams-of-ability-not-age-and-have-feisty-skater-names-such-as-lil-bruiser-ripper-n-half-and-felony-melanie-picture-taken-june-7-2013-reuters-lucy-nicholson-united-states-tags-society-sport-2cxn6g9.jpg)