U.S. Air Force Airman 1st Class Jacob Kyler, a 525th Aircraft Maintenance Unit weapons load crew member, does aircraft recovery procedures for an Agile Combat Employment (ACE) missile download exercise during a Polar Force (PF) 20-1 exercise at Joint Base Elmendorf-Richardson, Alaska, Oct. 1, 2019. PF 20-1 is designed to exercise multiple elements of the ACE concept of operations. These elements include generating fifth-generation combat power from austere locations, command and control using non-traditional methods, and rapid airlift capabilities to sustain a forward operating location. The ACE concept enables 3rd Wing to deliver lethal airpower for the United States, even in a contested environment.