KENNEDY SPACE CENTER, FLA. -- After their arrival at KSC, STS-117 crew members take part in a payload bay walkdown on Launch Pad 39A to look at the cargo in Space Shuttle Atlantis. The payload includes the S3/S4 integrated truss structure for the International Space Station. STS-117 is scheduled to launch at 7:38 p.m. June 8. During the 11-day mission and three spacewalks, the crew will work with flight controllers at NASA's Johnson Space Center in Houston to install the 17-ton segment on the station's girder-like truss and deploy the set of solar arrays, S3/S4. The mission will increase the space station's power capability in preparation for the arrival of new science modules from the European and Japanese space agencies. Photo credit: NASA/Kim Shiflett KSC-07pd1363