Photos: High-tech prosthetics

Inspired by the shape of a cheetah's rear leg, the Cheetah Flex-Foot prosthetic sprinting foot allows runners to gain a little extra altitude. Made of carbon fiber, the foot was designed by Van Phillips, engineered by Hilary Pouchak and manufactured by Ossur North America. The runner pictured here is Marlon Shirley.

Photo by Ossur North America