At NASA's Kennedy Space Center crew members pose for the traditional portrait on launch day.

At NASA's Kennedy Space Center in Florida, STS-128 crew members pose for the traditional portrait on launch day. From left are Mission Specialists Nicole Stott, Christer Fuglesang, John "Danny" Olivas, Jose Hernandez, and Patrick Forrester; Pilot Kevin Ford; and Commander Rick Sturckow. Next, the crew will suit up and then head to the Astrovan for the 3.4-mile drive to Launch Pad 39A. Liftoff aboard space shuttle Discovery is scheduled for 1:36 a.m. EDT Aug. 25.

The 13-day mission will deliver more than 7 tons of supplies, science racks and equipment, as well as additional environmental hardware to sustain six crew members on the International Space Station. The equipment includes a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. The mission is the 128th in the Space Shuttle Program, the 37th flight of Discovery and the 30th station assembly flight. Photo credit: NASA/Kim Shiflett