U.S. Air Force Airman 1st Class Joshua Tears-Knapp, 23d Equipment Maintenance Squadron aircraft metals technology technician, watches a horizontal bend saw cut steel, March 18, 2016, at Moody Air Force Base, Ga. Metals technology technicians must abide by the welding and machinery measuring tolerance of three thousandths of an inch, which is approximately the width of a human hair. (U.S. Air Force photo by Airman 1st Class Greg Nash/Released)