U.S. Air Force Staff Sgt. Paul Rosales, 55th Security Forces Squadron combat arms training and maintenance instructor, 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)