June 26, 2007

Dwayne Brown/Grey Hautaluoma Headquarters, Washington 202-358-1726/0668

Guy Webster/Gay Yee Hill Jet Propulsion Laboratory, Pasadena, Calif 818-354-5011

MEDIA ADVISORY: M07-73

NASA TELECONFERENCE TO DISCUSS UPCOMING TREK FOR MARS ROVER

WASHINGTON - NASA will hold a media teleconference at 1 p m EDT, Thursday, June 28, to discuss the scientific reasoning and risks related to the Mars rover Opportunity's planned descent into the massive "Victoria Crater " Opportunity has been exploring layered rocks in cliffs around the Martian crater

Briefing participants are:

-- Alan Stern, NASA associate administrator, Science Mission Directorate, NASA Headquarters, Washington -- Michael Meyer, lead Mars program scientist, Science Mission Directorate, NASA Headquarters, Washington -- John Callas, Mars Exploration Rover project manager, NASA's Jet Propulsion Laboratory, Pasadena, Calif -- Steve Squyres, principal investigator, Mars Exploration Rover science instruments, Cornell University, Ithaca, N Y

Media interested in participating in the teleconference should call 888-398-6118 International media should call 210-234-0018 The passcode is "crater "

Live audio of the teleconference will be streamed at:

http://www nasa gov/newsaudio

Audio replays of the teleconference will be available until July 2 by calling 866-458-4759 International media should call 203-369-1316

Supporting images and graphics for the teleconference will be posted at:

http://www nasa gov/rovers

-end-

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