Photos: Atlas 5 rocket soars from West Coast

Watch live views from the Kennedy Space Center’s launch pad 39A as SpaceX prepares for the first flight of the Block 5 Falcon 9 rocket. The rocket is scheduled to launch the Bangabandhu 1 communications satellite no earlier than 10 May.

The mission, dubbed Cert-2 by United Launch Alliance, is the final mission required before the rocket can begin launching national security missions. Liftoff is set for the beginning of a three-hour window at 6 a.m. EDT (1000 UTC).

United Launch Alliance and SpaceX beat out Northrop Grumman and Jeff Bezos’ Blue Origin for billions of dollars in U.S. military rocket contracts, and will share the load in launching the Pentagon’s highest-priority national security space missions through 2027, officials announced Friday.