About Dr. Williams:
Canadianphysician,public speaker,CEO, author and a retiredCSA 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.