Jeffrey Ashby and Pamela Melroy take a momentary break from training at Pad 39B during Terminal Countdown Demonstration Test activities.

STS-112 Commander Jeffrey Ashby, Mission Specialist Sandra Magnus, and Pilot Pamela Melroy take a momentary break from training at Pad 39B during Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. Launch of STS-112 aboard Space Shuttle Atlantis is scheduled for Oct. 2, between 2 and 6 p.m. EDT. STS-112 is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts.