Photos: Falcon 9 launch from Press Site

SpaceX crews at Vandenberg Air Force Base in California rolled out a Falcon 9 rocket and lifted it vertical atop its launch pad ahead of a planned blastoff Wednesday with a Spanish radar observation satellite and two test probes for a planned global broadband Internet network.

Nine Merlin main engines on a SpaceX Falcon 9 rocket ignited at 12 p.m. EDT (1600 GMT) Friday, April 17, during a hold-down test-firing on launch pad 39A at NASA’s Kennedy Space Center in Florida.

United Launch Alliance scrubbed the launch of a Delta 4-Heavy rocket Wednesday night less than 10 seconds before liftoff from Cape Canaveral, the second such abort suffered by this mission.. The launch of a classified National Reconnaissance Office spy satellite is expected to be delayed at least several more days as engineers assess the cause of Wednesday’s last-minute abort.