Col Kenneth Rizer, Commander, 11th Wing/Joint Base Andrews, Commandant of Marine Corps Gen. James F. Amos and Navy Captain Randy Johnson, Navy Air Facility Washington commander, arrive for the opening ceremony of 2012 Joint Service Open House, May 19 at Joint Base Andrews, Md. This year's Joint Service Open House celebrates the Centennial of Marine Corps Aviation. JSOH affords the public and opportunity to meet the men and women of the Armed Forces while viewing more than 100 static displays and 19 aerial demonstration teams.