Live coverage: Atlas 5 countdown and launch journal

SpaceX launched a Falcon 9 rocket at 7:29 a.m. PDT (10:29 a.m. EDT; 1429 UTC) Sunday from Vandenberg Space Force Base, California with 10 missile tracking and data relay satellites for the U.S. military’s Space Development Agency. The launch occurred three days after SpaceX aborted the first launch attempt at T-minus 3 seconds to examine data from one of the Falcon 9’s main engines.

Three rockets under the existing Block Buy between the Pentagon and United Launch Alliance have been assigned configurations and payloads.

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.