A real nifty foto of an AF guy from a 1952 C.B. Colby book I got, with service cap and flight suit, does it look like he's removed the grommet in his cap to you all? That doohickey he's monkeying with is in fact a weapon, the USAF M6 Survival .22 Cal/410 Gauge Rifle/Shotgun.
Here's a good talk on the gun.
Cool picture.I have one of those over/under survival rifles, need to dig it out.The butt opens, as seen in the picture, and you stored your .22/420 ammo there.