Photos: Atlas 5 on the pad at sundown

Gusty winds associated with a subtropical low pressure system prevented United Launch Alliance from sending an Atlas 5 rocket into orbit Saturday from Cape Canaveral with the U.S. Air Force’s clandestine X-37B spaceplane. ULA plans to try again Sunday, and a SpaceX Falcon 9 rocket launch from a nearby pad has been delayed to Tuesday.

These photos show a 194-foot-tall United Launch Alliance Atlas 5 rocket standing on pad 41 at Cape Canaveral Space Force Station in advance of a planned launch with the U.S. Space Force’s fifth SBIRS missile warning satellite.

The last Delta 4 launcher to fly in a single-core configuration rumbled into space Thursday morning from Cape Canaveral with a GPS navigation satellite, leaving United Launch Alliance with five more Delta 4-Heavy missions on contract through late 2023 before the Delta rocket family retires from service.