Ronnie Woods, a heating ventilation and cooling technician contracted by the Department of Defense, walks across rafters at Ellsworth Air Force Base, S.D., March 26, 2018. The new dormitories began construction January 2017 and are projected to be completed January 2019 at a cost of approximately $21.5 million. (U.S. Air Force photo by Airman 1st Class Thomas Karol)