Marines make the plunge for morale
Approximately 40 Marines from the Center for Naval Aviation Technical Training Unit, run in formation into the base lake Feb. 13 at Little Rock Air Force Base, Ark. The dip into the frigid lake was part of the second annual Polar Bear Plunge, an event intended to boost unit camaraderie. (U.S. Air Force photo by Airman 1st Class Harry Brexel)