U. S. Anti-Aircraft Battery - Shows Teamwork In Action -- The gun crew of a 90 mm. anti-aircraft piece of the U.S. Army is ready to go into action. Located in heavily barricaded pits across the sand can be seen the height finder (to the left), direction finder (right) and the battery commander's and range officer's post. The gun crew has elevated its weapon, the ammunition carriers and loader are ready with shells and the gunner has his hand on the trigger. February 08, 1943. (Photo by Interphoto News Pictures, Inc.).