Video: Atlas 5 launch with GOES-S viewed from KSC press site (members only)

Sixty more Starlink internet satellites are ready to rocket into orbit Sunday night from Cape Canaveral on the 100th flight of a SpaceX Falcon 9 launcher, and the seventh flight of SpaceX’s reusable “fleet leader” booster.

The United Launch Alliance Atlas 5 rocket that will hurl the four MMS satellites into a highly elliptical Earth orbit on March 12 has completed its basic build up at Cape Canaveral’s Complex 41 Vertical Integration Facility.

The four RS-25 engines at the bottom of NASA’s first Space Launch System core stage shut down about a minute into a ground test-firing Saturday that was supposed to last more than eight minutes.