Michael Corcoran, a prosthetist who has been working with Gadson, said he thinks prosthetics of the future will be more powerful.

CNN: Iraq veteran gets powerful new knees

Melissa is a two time world champion Paratriathlete and a prosthetist.

WHITEHOUSE: Champions of Change Blog

Kevin Murray, a prosthetist at the UK's National Center for Prosthetics and Orthotics, says advances in materials and technology have been dramatic since he began his career.

CNN: Powering prosthetics with thoughts alone