The last flight of the single-core variant of United Launch Alliance’s Delta 4 rocket lifted off at 9:06 a.m. EDT (1306 GMT) Thursday from Cape Canaveral Air Force Station, Florida. The 207-foot-tall launcher carried a GPS navigation satellite into orbit for the U.S. Air Force.

Rolling toward a mid-May deployment of a clandestine spy satellite, United Launch Alliance’s triple-body Delta 4-Heavy rocket moved from its Cape Canaveral assembly building to pad 37B yesterday.

A Vega rocket fired into space at 8:52 p.m. EST Monday (0152 GMT Tuesday) from the Guiana Space Center in South America, but the mission deviated from its planned trajectory. The rocket was boosting a Spanish Earth observation satellite and a French research payload into orbit.