The crew members pause for a photo in front of the Astrovan before heading to NASA Kennedy Space Center's Launch Pad 39A and a countdown.

The suited STS-128 crew members pause for a photo in front of the Astrovan before heading to NASA Kennedy Space Center's Launch Pad 39A and a simulated launch countdown. From left are Mission Specialists Danny Olivas, Nicole Stott, Christer Fuglesang, Jose Hernandez and Patrick Forrester, Pilot Kevin Ford and Commander Rick Sturckow. The countdown is the culmination of terminal countdown demonstration test activities to prepare the STS-128 crew for launch on space shuttle Discovery's STS-128 mission. Discovery will deliver 33,000 pounds of equipment to the station, including science and storage racks, a freezer to store research samples, a new sleeping compartment and the COLBERT treadmill. Launch is targeted for late August. Photo credit: NASA/Kim Shiflett