NASA Administrator Michael Griffin and Associate Administrator for Space Operations William Gerstenmaier will brief the media about the space shuttle program and processing for the next mission (STS-121) Friday, April 28, at 11 a.m. EDT. The briefing will be in the NASA headquarters auditorium, 300 E. St. S.W., Washington.

Space Shuttle Program Manager Wayne Hale will join them electronically from NASA’s Marshall Space Flight Center, Huntsville, Ala. NASA TV will air the briefing live. Journalists at NASA headquarters and participating agency locations may ask questions.

NASA TV’s Public, Education and Media channels are available on an MPEG-2 digital C-band signal accessed via satellite AMC-6, at 72 degrees west longitude, transponder 17C, 4040 MHz, vertical polarization. In Alaska and Hawaii, they’re on AMC-7 at 137 degrees west longitude, transponder 18C, at 4060 MHz, horizontal polarization. For digital downlink information and links to streaming video, visit:

http://www.nasa.gov/ntv

For information about NASA’s Space Shuttle Program, STS-121 and its crew, visit:

http://www.nasa.gov/shuttle