Airmen from the 127th Civil Engineer Squadron, Michigan National Guard, install a new air conditioning unit and ductwork at Selfridge Air National Guard Base, Michigan, March 21, 2025. These highly-trained experts use their specialized skill sets, materials, tools and equipment to build anything the Air Force needs, from improvised emergency disaster relief shelters to quality of life projects. (U.S. Air National Guard video by Airman 1st Class Jacob Hessen) More