Airman 1st Class Olajide Adebiyi, above, and Airman 1st Class Jordan Kimble, 364th Training Squadron electrical and environmental systems apprentice course students, have their instructor check their work at Sheppard Air Force Base, Texas, Dec. 6, 2018. Adebiyi and Kimble just finished installing a transformer rectifier. Their instructor shows them what to look for to make sure it is completely secure. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)