Commandant of the Marine Corps Gen. James F. Amos commences the opening ceremonies of the Joint Service Open House 2012. This year's JSOH celebrates the centennial of Marine Corps aviation. The event affords the public an opportunity to meet the men and women of the armed forces while viewing more than 100 static displays and 19 aerial demonstration teams. (U.S. Navy photo by Mass Communication Specialist 1st Class Clifford L. H. Davis/Released)