Waterside view of Delta 4 GPS 2F-6 Launch

Liftoff from Space Launch Complex 41 at Cape Canaveral Space Force Station occurred at 3:28 a.m. EST (0828 UTC), as the RD-180 engine on the booster roared to lift alongside five solid rocket boosters.

The Falcon 9 booster that dramatically flew back to Earth last month following a commercial satellite launch ignited again Friday in a hold-down test at SpaceX’s Cape Canaveral launch pad, days before the company is due to launch its next mission from California, officials said.

United Launch Alliance’s next launch attempt for its Delta 4-Heavy rocket from Cape Canaveral with a top secret U.S. government spy satellite will be delayed to no earlier than early Tuesday.