U.S. Air Force Senior Airman Michael Quatman, 317th Maintenance Squadron aircraft fuel system journeyman, checks the sealant on a training C-130 J Super Hercules wing at Dyess Air Force Base, Texas, Dec. 20, 2017. The sealant, which is used to repair leaks, goes on as a liquid and dries as a rubbery material. (U.S. Air Force photo by Airman 1st Class Kylee Thomas)