KSC-96EC-0824 - STS-78 Payload Specialist Robert Brent Thirsk suits up STS-78 Payload Specialist Robert Brent Thirsk is donning his launch/entry suit in the Operations and Checkout Building. A representative of the Canadian Space Agency (CSA), Thirsk is one of four spaceflight rookies flying on STS-78. He is a physician who also has a master's degree in mechanical engineering. In a short while, Thirsk and his six fellow crew members will depart the O&C and head for Launch Pad 39B, where the Space Shuttle Columbia awaits liftoff during a two-and-a-half hour launch window opening at 10:49 a.m. EDT, June 20. STS-78 will be an extended duration flight during which extensive research will be conducted in the Life and Microgravity Spacelab (LMS) located in the payload bay. 06/20/96