![Paris Roller Girls (red) playing a match against Metz 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 Metz 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/2E0BB6P/paris-roller-girls-red-playing-a-match-against-metz-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-2E0BB6P.jpg)
Paris Roller Girls (red) playing a match against Metz 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 Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national](https://l450v.alamy.com/450v/2e0bb5e/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-2e0bb5e.jpg)
Metz Roller Girls (red) playing a match against Strasbourg Roller Derby Girls (blue) during a national
![Buy METZ Heavy Duty Jenny Bench SWAGER SWAGING Machine Bead Roller Online at Lowest Price in Saint Helena, Ascension and Tristan da Cunha. B00K1CRM9E Buy METZ Heavy Duty Jenny Bench SWAGER SWAGING Machine Bead Roller Online at Lowest Price in Saint Helena, Ascension and Tristan da Cunha. B00K1CRM9E](https://www.ubuy.com/productimg/?image=aHR0cHM6Ly9tLm1lZGlhLWFtYXpvbi5jb20vaW1hZ2VzL0kvNDFFVzUwMWh6WEwuX1NTNDAwXy5qcGc.jpg)