Space shuttle Discovery atop a mobile launch platform begins rollout to Launch Pad 39A at NASA's Kennedy Space Center.

Getting ready for the STS-124 mission, space shuttle Discovery, atop a mobile launch platform, begins rollout to Launch Pad 39A at NASA's Kennedy Space Center. The 3.4-mile journey from the Vehicle Assembly Building began at 11:47 p.m. on May 2. After arriving at the pad, the shuttle was secured, or hard down, at 6:06 a.m. EDT May 3. On the 13-day mission, Discovery and its crew will deliver the Japan Aerospace Exploration Agency's Japanese Experiment Module – Pressurized Module and the Japanese Remote Manipulator System. Launch is targeted for May 31. Photo credit: NASA/Troy Cryder