Down on all fours goes a squad of future instructors, practising the bear walk for crossing snow against enemy fire

Original Toronto Star caption: Down on all fours goes a squad of future instructors; practising the bear walk for crossing snow against enemy fire. Rifles and packs on their backs; they grip the ski harness in their hands and lumber over the snow in a bear-like crouch. They learn; too; how to achieve invisibility against scouting enemy aircraft