SUBMITTED BY ARTHUR N1ORC - AMSAT A/C #31468

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 3 to 5 p.m. EDT(1900 TO 2100 UTC)on Friday, July 13TH, 2007 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-

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