NASA will hold a series of media briefings on Wednesday, May 27, to preview the upcoming space shuttle mission to the International Space Station. NASA Television and the agency's Web site will provide live coverage of the briefings from NASA's Johnson Space Center in Houston. Questions also will be taken from other participating NASA locations.

Shuttle Endeavour's 16-day flight, called STS-127, is targeted to launch on June 13. The flight will deliver a new station crew member and will complete construction of the Japan Aerospace Exploration Agency's Kibo laboratory. The shuttle and station crews will attach a platform to the outside of the Japanese module. The platform will serve as a type of "front porch" for experiments that require direct exposure to space.

NASA managers completed a review Thursday of space shuttle Atlantis' readiness for flight and selected an official launch date for the STS-125 mission to upgrade the Hubble Space Telescope. Commander Scott Altman and his six crewmates are scheduled to lift off at 2:01 p.m. EDT, May 11, from NASA's Kennedy Space Center in Florida.

Atlantis' launch date was announced following Thursday's Flight Readiness Review. During the meeting, top NASA and contractor managers assessed the risks associated with the mission and determined the shuttle's equipment, support systems and procedures are ready for flight.