A Delta 2 rocket, the last one planned to launch from Cape Canaveral and next-to-last planned Delta 2 as of this launch, will send NASA's twin GRAIL spacecraft on a mission to orbit the moon. The rocket is in the Heavy configuration with slightly larger solid rocket boosters than a normal Delta 2, for the sixth time. In this time-lapse photo, taken in the late evening of September 7, 2011, The Mobile Service Tower at Complex 17 Pad B rolls back from the rocket.

Copyright Ben Cooper, launchphotography.com