The launch of NASA’s twin GRAIL spacecraft

The next-to-last Delta 2 rocket is being stacked at its California launch site to take flight in January to put a civilian weather satellite into polar orbit.

The Mobile Service Tower at LC-17B is rolled away from the Delta 2 rocket that launched NASA’s Mars Pathfinder mission on its way to the red planet on December 4, 1996. This video includes footage shot inside the blockhouse at the launch pad.

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.