Cape Canaveral Air Force Station a Booster SRB is raised from its transporter under the mobile service tower.

On Pad 17-B, Cape Canaveral Air Force Station, a third Solid Rocket Booster (SRB) is raised from its transporter under the mobile service tower. It will be lifted up the tower to join the other SRBs there and later mated to the Boeing Delta II Heavy rocket for the Aug. 2 launch of the MESSENGER spacecraft to the planet Mercury. The spacecraft is expected to reach orbit around Mercury in March 2011. MESSENGER was built for NASA by the Johns Hopkins University Applied Physics Laboratory in Laurel, Md.