NASA will broadcast a two crew member spacewalk beginning 6 a.m. Eastern Time this coming Weds., Sept. 5. (The actual spacewalk is scheduled for 7:15 a.m.) The spacewalk will be the second attempt to install a replacement power-switching unit on the International Space Station. The last attempt, on Aug. 30, lasted 8 hours and 17 minutes but ended unsuccessfully. Expedition 32 Flight Engineers Sunita Williams of NASA and Akihiko Hoshide of the Japan Aerospace Exploration Agency will again conduct the install. As with all NASA broadcasts, the footage is presented in HD quality. For more NASA schedules, visit http://www.nasa.gov/ntv.