Photos: Atlas 5 rolls out for launch

Launching the Wideband Global SATCOM 9 satellite purchased by allied nations in collaboration with the U.S. military’s worldwide communications network, a United Launch Alliance Delta 4 rocket thundered away from Cape Canaveral at 8:18 p.m. EDT (0018 GMT).

Lockheed Martin, the largest U.S. defense contractor, announced late Sunday that it has reached a deal valued at $4.4 billion to acquire Aerojet Rocketdyne, a supplier of engines to NASA’s Space Launch System moon rocket and United Launch Alliance’s Atlas, Delta, and Vulcan rockets.

The 75th Atlas 5 rocket rolled to its launch pad at Cape Canaveral on Wednesday, a day before it was scheduled to lift off with a U.S. Air Force satellite to provide warnings of missile launches that might threaten U.S. territories and allies.