U.S. Air Force Airmen assigned to the 633rd Civil Engineer Squadron participate in a leadership reaction course for a Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Va., April 20, 2017. The Airmen perform the training every month for deployment readiness. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)

U.S. Air Force 2nd Lt. Peter Last, 633rd Civil Engineer Squadron operations engineer element officer in charge, ties a knot on a pipe during a Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Va., April 20, 2017. The training took place at the obstacle and leadership reaction courses at Fort Eustis, Va., to help build morale and confidence. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)

U.S. Air Force Airmen assigned to the 633rd Civil Engineer Squadron move a pipe across a moat during a Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Va., April 20, 2017. The training is held at the leadership reaction course to encourage the Airmen to communicate, learn each other’s skills and sharpen their confidence. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)

U.S. Air Force Tech. Sgt. Rodger Jones and Staff Sgt. Matthew Lawrence, 633rd Civil Engineer Squadron pavement and construction equipment technicians, participate during a Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Va., April 20, 2017. Each team is required to move items and themselves across a water obstacle in under 20 minutes. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)

U.S. Air Force Senior Airman Nicholas Flusher, 633rd Civil Engineer Squadron water and fuels system management technician, crosses a moat during a Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Va., April 20, 2017. The 633rd CES teams utilized the training was as a way to prepare for various environments that they may encounter on deployment. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)

U.S. Air Force Senior Airman Ashley King, 633rd Civil Engineer Squadron pest management technician, crawls along a pipe during a Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Va., April 20, 2017. The five teams that participated in the training had to assess the best way to accomplish the course, which involved each member having to cross a moat within a specific amount of time. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)