July 10, 2007 Katherine Trinidad Headquarters, Washington 202-358-3749 James Hartsfield Johnson Space Center, Houston 281-483-5111 MEDIA ADVISORY: M07-085 CANADIAN ASTRONAUT TO DISCUSS ROLE ON NEXT SHUTTLE FLIGHT HOUSTON - Canadian Space Agency astronaut and physician Dave Williams, who is set to launch in August aboard NASA's space shuttle Endeavour, will be available for satellite interviews from 2 to 4 p.m. CDT on Friday, July 13. Media interested in participating should contact NASA's Johnson Space Center newsroom at 281-483-5111 by 5 p.m., Thursday, July 12. Williams, a former emergency room physician, will be making his second spaceflight. He first flew as a mission specialist aboard space shuttle Columbia on the STS-90 mission in April 1998. During the Endeavour mission, designated STS-118, he will conduct at least two spacewalks to continue assembly of the International Space Station. The Canadian Space Agency selected Williams, a native of Saskatoon, Saskatchewan, Canada, as an astronaut in 1992. He began training with NASA three years later. His career includes participating in two missions as a crew member in the Aquarius Underwater Research Facility off the Florida coast. For complete biographical information about Williams, visit: http://www.jsc.nasa.gov/Bios/htmlbios/williams.html For NASA Television downlink, schedule and steaming video information, visit: http://www.nasa.gov/ntv For more information about the STS-118 mission and its crew, visit: http://www.nasa.gov/shuttle -end- To subscribe to the list, send a message to: hqnews-subscribe@xxxxxxxxxxxxxxxxxxxxxx To remove your address from the list, send a message to: hqnews-unsubscribe@xxxxxxxxxxxxxxxxxxxxxx