Video: Tower rollback prior to launch of Mars Pathfinder atop a Delta 2

NASA twin GRAIL spacecraft are launched on September 10, 2011 aboard the most-powerful configuration of a Delta II rocket, the 7920H-10.

A Delta 2 rocket lifted off from California’s Central Coast Saturday after back-to-back scrubbed launch attempts earlier this week. The Delta 2 delivered the JPSS 1 weather satellite to orbit for NOAA.

A United Launch Alliance Delta 2 rocket lifted off Saturday from Vandenberg Air Force Base in California with the JPSS 1 weather satellite, the first in a new line of polar-orbiting observatories for NOAA.