"Parkour," "Le Parkour," "PK," and "Urban Free Flow" are all names for a new sport, invented in France, attracting followers in the UK and US. London-born Circe, who emigrated in 1991 to study at the Rochester Institute of Technology and with Eddie Adams, initially began photographing Parkours in England and France for YM and the hip-hop magazine Fader. "These are young kids that jump buildings, cars, concrete spaces; like skateboarding except no board," says Circe. "Their sport is moving through the air. It's yet another way of using the urban landscape as a form of expression." Circe's clients include Elle, Jane, Vibe, Vogue, and Esquire. Her work can be seen at www.circephoto.com.