Members assigned to the 153d Airlift Wing Maintenance Squadron perform an engine upgrade on a C-130 Hercules aircraft at the Wyoming Air National Guard base, Cheyenne, Wyo. June 28, 2021. The upgrade consists of T-56 Rolls Royce 3.5 engines, NP2000 eight-bladed propellers and electronic propeller controls. (U.S. Air National Guard video by Tech. Sgt. Jon Alderman) More