Photos: X-37B gallery archive

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.

Four weeks, three launches, two coasts. October was an unprecedented month for United Launch Alliance and its venerable workhorse rocket.

For the second day running, computers automatically aborted a Falcon 9 launch countdown Monday at NASA’s Kennedy Space Center in Florida in the final seconds before liftoff with the Intelsat 35e communications satellite.