U.S. Air Force Tech. Sgt. Daniel Caban, 1st Aircraft Maintenance Squadron crew chief, stands in front of an F-22 Raptor at Joint Base Langley-Eustis, Virginia, Oct. 23, 2019. Caban created Portable Magnetic Aircraft Covers, also known as PMAC, made of polymagnets and Nomex IIIA fibers that aim to protect the jet intakes from the elements and lower the need for maintenance. (U.S. Air Force photo by Senior Airman Monica Roybal)