Live coverage: SpaceX launches another batch of Starlink satellites

Carrying a sophisticated billion-dollar missile detection satellite for the U.S. military, a United Launch Alliance Atlas 5 rocket lifted off from Cape Canaveral on Tuesday with 1.6 million pounds of thrust from a Russian RD-180 main engine and twin solid rocket boosters.

The launch of a Boeing-built Mexican communications satellite on a Proton rocket has been postponed after engineers discovered an anomaly on a similar spacecraft.

The mission is part of SpaceX’s plan to bolster its internet network in Alaska and other polar regions. The Falcon 9 rocket lifted off from pad 4 East at Vandenberg Space Force Base at 8:52 p.m. PDT (11:52 p.m. EDT / 0352 UTC).