Video: Zoomed in view of ignition of Falcon 9 engines in prelaunch test (members only)

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.

SpaceX test-fired a Falcon 9 rocket Monday evening at Cape Canaveral Space Force Station, paving the way for launch of 60 more Starlink internet satellites Tuesday night.

A Falcon 9 booster fresh from SpaceX’s factory briefly fired its nine Merlin main engines Tuesday on a Cape Canaveral launch pad, passing a key test before liftoff Dec. 4 with a Dragon supply ship heading for the International Space Station.