Crew members of a B-50 Superfortress,of the Strategic Air Command (SAC), 43rd Bomb Wing, at Davis-Monthan AFB,Tucson, Arizona, are lined up near left wing of the plane. Aircraft commander prepares to inspect crew members before flight. Three B-50s are lined up for flights. Lead B-50 takes off while others moving into takeoff positions. The B-50s display the 43rd Bomb Wing insignia on side of fuselage and tail code letter circle K.