Engineers at Astrotech Space Operations in Titusville, Fla. encapsulate the fourth Advanced Extremely High Frequency-4 satellite in an Atlas V 531 rocket’s payload fairing Sept. 27, 2018. The encapsulation process was a major milestone for the Defense Contract Management Agency Lockheed Martin Sunnyvale team, which recently completed its role in delivering the Air Force’s AEHF-4 satellite. (Air Force photo by Derwin Oviedo)