Airman 1st Class Austin Nelson, 436th Civil Engineer Squadron pavements and heavy equipment apprentice, operates a backhoe during Prime Base Engineer Emergency Force (Prime BEEF) Day Nov. 28, 2018, at Dover Air Force Base, Del. Prime BEEF Day is a squadron-wide training day focused on maintaining and refreshing all civil engineering Airmen on readiness requirements and operational capabilities. (U.S. Photo by Airman First Class Dedan D. Dials)