U.S. Army Maj. Tim Shelby, 689th Rapid Port Opening Element, commander, applies chalk to his hands for better grip during the Murph Challenge at Joint Base Langley-Eustis, Virginia, May 22, 2023. During Honor the Fallen week, participants are encouraged to keep pushing through pain and exhaustion, as former U.S. Navy SEAL Lt. Michael Murphy did during his final moments while fighting the Global War on Terrorism. (U.S. Air Force photo by Senior Airman Anna Nolte)