Photos: Tuesday’s Atlas 5 rollout

The 32-story-tall mobile service tower at the Delta 4’s launch pad at Vandenberg Air Force Base in California was retracted away from the rocket Thursday in advance of a planned liftoff with a top secret National Reconnaissance Office payload.

Spaceflight Now members can watch a live view of Cape Canaveral’s Complex 41 launch pad as an Atlas 5 rocket counts down to liftoff at 5:02 p.m. EST (2202 GMT) Thursday with the GOES-S weather satellite.

A Boeing Starliner crew capsule fired off a stand early Monday at White Sands Missile Range in New Mexico on a mile-high test flight to validate the spacecraft’s emergency escape thrusters. Only two of the ship’s three main parachutes deployed on descent, but Boeing officials do not expect any impacts on the planned launch of an unpiloted Starliner demonstration mission to the International Space Station in December.