Q&A with Mike Laidley, vice president of Orbital ATK’s Next Generation Launch program (members only)

Marking United Launch Alliance’s 12th and last rocket flight in 2016, the Atlas 5 rocket departed Cape Canaveral on Sunday afternoon carrying EchoStar 19 to provide Internet connectivity across North America.

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.

A Northrop Grumman Antares rocket rolled out of its hangar Monday night, riding a self-propelled transporter for a mile-long trip to launch pad 0A on Wallops Island, Virginia, for a predawn liftoff Thursday with a Cygnus supply ship heading for the International Space Station.