![Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport. Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.](https://c8.alamy.com/comp/2E0BB4W/metz-roller-girls-red-playing-a-match-against-strasbourg-roller-derby-girls-blue-during-a-national-tournament-in-nantes-western-france-on-march-17-2012-roller-derby-is-an-american-invented-contact-sport-the-game-involves-two-teams-of-players-who-are-racing-around-an-oval-racetrack-in-each-team-there-is-a-scoring-player-designated-as-the-jammer-among-the-other-members-called-blockers-the-real-race-is-occuring-between-the-two-jammers-while-the-blockers-are-trying-to-bring-them-down-photo-by-laetitia-notarianniabacapresscom-2E0BB4W.jpg)
Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact sport.
![Paris Roller Girls (red) playing a match against Duchesses Nantes Roller Derby Girls (green) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact Paris Roller Girls (red) playing a match against Duchesses Nantes Roller Derby Girls (green) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact](https://c8.alamy.com/comp/2E0BB44/paris-roller-girls-red-playing-a-match-against-duchesses-nantes-roller-derby-girls-green-during-a-national-tournament-in-nantes-western-france-on-march-17-2012-roller-derby-is-an-american-invented-contact-sport-the-game-involves-two-teams-of-players-who-are-racing-around-an-oval-racetrack-in-each-team-there-is-a-scoring-player-designated-as-the-jammer-among-the-other-members-called-blockers-the-real-race-is-occuring-between-the-two-jammers-while-the-blockers-are-trying-to-bring-them-down-photo-by-laetitia-notarianniabacapresscom-2E0BB44.jpg)
Paris Roller Girls (red) playing a match against Duchesses Nantes Roller Derby Girls (green) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact
![Paris Roller Girls (red) playing a match against Duchesses Nantes Roller Derby Girls (green) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact Paris Roller Girls (red) playing a match against Duchesses Nantes Roller Derby Girls (green) during a national tournament in Nantes, western France on March 17, 2012. Roller Derby is an American-invented contact](https://c8.alamy.com/comp/2E0BB62/paris-roller-girls-red-playing-a-match-against-duchesses-nantes-roller-derby-girls-green-during-a-national-tournament-in-nantes-western-france-on-march-17-2012-roller-derby-is-an-american-invented-contact-sport-the-game-involves-two-teams-of-players-who-are-racing-around-an-oval-racetrack-in-each-team-there-is-a-scoring-player-designated-as-the-jammer-among-the-other-members-called-blockers-the-real-race-is-occuring-between-the-two-jammers-while-the-blockers-are-trying-to-bring-them-down-photo-by-laetitia-notarianniabacapresscom-2E0BB62.jpg)