U.S. Air Force Airman 1st Class Austin Mayo, 51st Combat Communications Squadron electrical power production technician, installs grounding wire while helping build the forward headquarters, or “tent city,” in preparation for Mission Readiness Exercise (MRX) 19-2, Shaw AFB, S.C., Nov. 26, 2018. MRX 19-2 was an initial operational capability certification event designed to demonstrate Ninth Air Force’s ability to effectively plan, prepare, execute and assess Combined Joint Task Force operations at the operational level of war as tasked by the Air Force Chief of Staff. (U.S. Air Force photo by Tech. Sgt. Amanda Dick)