U.S. Air Force Master Sgt. James Childs, 173rd Fighter Wing vehicle maintenance shop, wipes heavy-duty grease from his fingers after helping remove a broken part from a snow plow at Kingsley Field in Klamath Falls, Oregon, Jan. 8, 2019. Most, if not all, parts the shop works on are covered in a protective layer of grease or oil making dirty hands a part of everyday life for the mechanics; it’s also why a job isn’t finished until the tools and the workspaces are cleaned and prepared for the next job. (U.S. Air National Guard photo by Tech. Sgt. Jefferson Thompson)