U.S. Air Force Airman 1st Class Reese Collins, 21st Civil Engineer Squadron explosive ordinance disposal technician, completes exercises during a memorial ruck at Peterson Space Force Base, Colorado, May 6, 2022. The exercises are performed half way through a six-mile ruck in honor of the late Airman 1st Class Matthew Seidler. (U.S. Space Force photo by Airman 1st Class Brooke Wise)