Photos: Delta 4 awaits blastoff

The rollout operation on Tuesday followed a day of evaluations using Boeing’s weight and center-of-gravity machine to determine the final measurements on the spacecraft. Launch is still targeting May 6 at 10:34 p.m. EDT (0234 UTC).

United Launch Alliance teams mounted a top secret payload for the National Reconnaissance Office on top of an Atlas 5 rocket Monday at Cape Canaveral in preparation for a liftoff scheduled just after sunset Nov. 3.

An Ariane 5 rocket took off on a rare morning launch Thursday with four Galileo navigation satellites, the heavy-lifter’s first flight in support of the European positioning and timing fleet. Liftoff from French Guiana occurred at 1306 GMT (8:06 a.m. EST).