Space shuttle Discovery, atop the mobile launcher platform and crawler-transporter, climbs the ramp to Launch Pad 39A at NASA's Kennedy Space Center in Florida. A laser guidance system and a leveling system on the crawler keeps the shuttle level as it moves up the ramp. At left is seen the fixed service structure with the 80-foot lightning mast on top. First motion out of the Vehicle Assembly Building was at 5:17 a.m. EST. Discovery was secured to the pad at 12:16 p.m. 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