Photos: Thursday’s Atlas 5 rollout to launch pad

Returning to the days of rollouts and launches in a span of only a few hours, the United Launch Alliance Atlas 5 program is looking to resume this whirlwind experience.

The United Launch Alliance Atlas 5 rocket, standing 197 feet tall and and weighing 1.2 million pounds, unleashes 2.4 million pounds of thrust from its main engine and four side-mounted solid boosters to launch the secret NROL-42 payload for the U.S. National Reconnaissance Office from Vandenberg Air Force Base, California.

Final preparations began this weekend at NASA’s Stennis Space Center in Mississippi to load super-cold liquid hydrogen and liquid oxygen into the massive core stage of the Space Launch System heavy-lift rocket for the first time as soon as Monday.