About Dr. Williams:

 Canadian physician, public speaker, CEO, author and a retired CSA astronaut. Dr. Williams was a mission specialist on two space shuttle missions. His first spaceflight, in 1998, was a 16-day mission aboard Space.

Dr Williams performed three spacewalks during STS-118 helping build and maintain the International Space Station. He holds the Canadian spacewalking record and spent over 4 hours riding Canadarm 2 on his second spacewalk.

Visit Dr. Williams website

Buy Dr. Williams book, Defying Limits