Original World War 2 business industry trade magazine vintage ad for GOODYEAR.  This Bird Cage is Built to Catch Sharks!  A year ago the eastern coastline of our country was infested by sharks of a vicious variety, sharks which brought flaming death to many American ships and seamen.  Today it is very unhealthy for those same sharks, thanks in large measure to the ceaseless patrolling of our shores by blimps, termed by a spokesman of the US Navy, the Natural Enemy of the U-Boat.  Goodyear, building airships for the Navy, and helping train pilots to operate them.  Old 1943 WW2 era propaganda magazine advertisement.