The crawler-transporter begins moving its cargo of space shuttle Discovery and mobile launcher platform out of the Vehicle Assembly Building.

The massive crawler-transporter begins moving its cargo of space shuttle Discovery and mobile launcher platform out of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida to Launch Pad 39A. At upper left is one of the two operator control cabs, one at each end of the chassis, used to control all crawler systems. First motion was at 5:17 a.m. EST. Discovery is targeted to launch to the International Space Station Feb. 12. During Discovery's 14-day mission, the crew will install the S6 truss segment and its solar arrays to the starboard side of the station, completing the station's backbone, or truss, enabling a six-person crew to live there starting in May. Photo credit: NASA/Troy Cryder