U.S. Air Force 2nd Lt. Christopher Hastings, 325th Security Forces Squadron operations flight commander, navigates land during Air Combat Command’s Defender Challenge team selection at Joint Base Langley-Eustis, Virginia, August 23, 2018. The team candidates were tasked with finding three points during the land navigation portion. (U.S. Air Force photo by Airman 1st Class Anthony Nin Leclerec)