A press briefing is scheduled for 4:30 p.m. EST Thursday in connection with the investigation into the Space Shuttle Columbia accident.

Ron Dittemore, NASA's Space Shuttle Program Manager, will update the press on the mishap investigation from the Johnson Space Center. Reporters will be able to ask questions from participating NASA centers. There is no press conference scheduled in Washington Thursday.

The press conferences will be broadcast on NASA Television. NASA Television is available on AMC-2, transponder 9C, C- Band, located at 85 degrees west longitude. The frequency is 3880.0 MHz. Polarization is vertical and audio is monaural at 6.8 MHz. Additional information about NASA is on the Internet at .http://www.nasa.gov.