Photos: Atlas 5 rocket soars from West Coast

SpaceX scrubbed an attempt to launch a commercial Falcon 9 rocket Sunday less than a minute before liftoff, blaming a sensor issue on the vehicle’s first stage and pushing back the company’s first national security mission for the U.S. government at least 24 hours.

The second Falcon Heavy fires its first stage engines as part of a routine pre-flight test for the upcoming launch of the Arabsat 6A communications satellite.

An Orbital ATK Cygnus supply ship packed with 3.7 tons of cargo, supplies and experiments rode an Antares rocket into orbit from Virginia’s Eastern Shore on Sunday, setting course on a two-day pursuit of the International Space Station.