An auxiliary power unit checklist and an aviation headset rest on the flight deck of a Dover Air Force Base C-5M Super Galaxy during a Major Command Service Tail Trainer at Holloman AFB, New Mexico, June 8, 2021. Following an initiative from Air Mobility Command, MSTTs have been in the training plan of the 9th Airlift Squadron since early 2021 to expedite upgrade and qualification training for C-5M Super Galaxy loadmasters and flight engineers. Of the 350 tasks needed to be a fully qualified loadmaster, roughly half can be completed during an MSTT. (U.S. Air Force photo by Senior Airman Faith Schaefer)