Watch live as a United Launch Alliance (ULA) Delta 4 Heavy rocket flies for the final time Liftoff from Space Launch Complex 37 at Cape Canaveral Space Force Station is scheduled for 2:45 p.m. EDT (1845 UTC) on Thursday, March 28. The three-core liquid hydrogen fueled rocket is carrying a top secret payload for the U.S. military's spy satellite agency, the National Reconnaissance Office (NRO). Our live coverage from Cape Canaveral, with commentary by Will Robinson-Smith, will begin about 90 minutes prior to launch. It will be the 16th launch for the Delta IV Heavy rocket.