Astronaut Pamela A. Melroy participates in a training session in the Space Vehicle Mockup Facility at Johnson Space Center.

While seated at the commander's station, astronaut Pamela A. Melroy, STS-120 commander, participates in a training session in the crew compartment trainer (CCT-2) in the Space Vehicle Mockup Facility at Johnson Space Center. Preparing for the STS-120 mission which launched October 23, 2007, Melroy is wearing a training version of her shuttle launch and entry suit.