This month, for the first time, an International Space Station crew will conduct a spacewalk with all crewmembers working outside the vehicle. This milestone event will be the subject of a televised news briefing Feb. 24 at 1 p.m. CST at NASA's Johnson Space Center in Houston.

The spacewalk will be covered live on NASA Television Feb. 26. Coverage will begin at 2 p.m. CST with commentary and available downlink television.

Expedition 8 Commander and NASA Science Officer Mike Foale and Flight Engineer Alexander Kaleri will work outside the Station for a five-and-a-half hour excursion to replace technological experiments and survey the exterior of the complex. Foale and Kaleri have a total of seven spacewalks to their credit. It will be the 52nd spacewalk in support of the assembly and maintenance of the Station.

The Feb. 24 briefing will be carried live on NASA Television. Officials will preview the spacewalk and discuss the latest work being conducted by Foale and Kaleri on the Space Station. Reporters at participating NASA centers will be able to ask questions.

The panel will include: -- Mike Suffredini, ISS Manager for Integration and Operations -- Joel Montalbano, Expedition 8 Lead Flight Director -- Pete Hasbrook, Expedition 8 Increment Manager -- Sally Davis, ISS EVA Lead Flight Director -- Mike Hembree, Expedition 8 Lead EVA Officer -- Dr. Janice Voss, ISS Increment Scientist

For the International Space Station, a spacewalk involving all crewmembers is a first. However, the Russian and U.S. space programs are very experienced in spacewalks of this kind. From the Russian Salyut and Mir space stations, cosmonauts performed about 50 two-person crew spacewalks without a crewmember inside.

When American astronauts walked on the moon, no one was inside the lunar modules. Also, during the first four Space Shuttle missions, which had only two crewmembers each, astronauts were prepared to do two-person spacewalks in the event of a contingency.

For more information about NASA on the Internet, visit:

http://www.nasa.gov

NASA Television is available on AMC-9, transponder 9C, C-Band, located at 85 degrees west longitude. The frequency is 3880.0 MHz. Polarization is vertical, and audio is monaural at 6.80 MHz. For information about NASA TV on the Internet, visit:

http://www.nasa.gov/multimedia/nasatv/index.html

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