WASHINGTON – NASA’s associate administrator for science, astronaut John Grunsfeld, today announced plans for a robust multi-year Mars program, including a new robotic science rover to launch in 2020. Grunsfeld will host a media briefing on these plans at 7 p.m. EST (4 p.m. PST) today at the annual meeting of the American Geophysical Union meeting in San Francisco.

The briefing will be held in the Moscone Convention Center West, 747 Howard St., Room 3000. Reporters attending must be registered as press for the meeting.

The briefing will be streamed live online and reporters will be able to ask questions via an online chat. Instructions are available from the meeting website at: http://go.nasa.gov/QEQeAU

Media also may e-mail questions in advance of or during the briefing. Send e-mails with name and media affiliation to Steve Cole at stephen.e.cole@nasa.gov.

The briefing will also be broadcast via UStream at: http://www.ustream.tv/nasajpl2

For information about NASA Mars activities, visit: http://www.nasa.gov/mars