Video: NROL-37 payload and Delta 4-Heavy rocket prepped for launch

The sixth and final satellite in the U.S. Space Force’s network of secure, jam-resistant AEHF communications satellites has been installed on top of a United Launch Alliance Atlas 5 rocket at Cape Canaveral for liftoff March 26.

Continuing a dizzying series of rescheduled launches from Florida’s Space Coast, poor weather at the Kennedy Space Center forced SpaceX to keep a Falcon 9 rocket and 60 Starlink broadband satellites on the ground Monday. The Starlink launch is expected to be delayed until Thursday, after a pair of national security missions are set to blast off from Cape Canaveral Tuesday.

The last Delta 4-Medium rocket lifted off from Cape Canaveral Thursday with a GPS navigation satellite for the U.S. Air Force.