Live coverage: Ariane 5 soars into space from Kourou

SpaceX fired up a Falcon 9 rocket at Cape Canaveral Wednesday in a pre-flight test for a Starlink satellite launch Sunday, moving closer to the company’s final mission before sending two NASA astronauts into orbit for the first time May 27.

The United Launch Alliance Atlas 5 rocket lifted off from Cape Canaveral at 8:37 a.m. EDT (1237 GMT) today to deploy a classified satellite in service to the national security of the United States. Follow the mission in our live journal.

SpaceX’s Falcon 9 rocket is awaiting liftoff from Cape Canaveral’s Complex 40 launch pad as soon as Tuesday after three scrubs caused by propellant loading problems and a boat that strayed into restricted waters in the Atlantic Ocean.