Various models of aircraft, unit patches and aircrew flying helmets are part of a display honoring the 40th Helicopter Squadron in the base museum April 28, 2017, at Malmstrom Air Force Base, Mont. The display is the first helicopter display at the museum and recognizes the relationship between the assigned units as well as the service of 40th aircrew members in support of the nation’s nuclear deterrence mission. (U.S. Air Force photo/Airman 1st Class Daniel Brosam)