Lt. C.J. Simonsen, of the U.S. Navy flight demonstration squadron Blue Angels, autographs a group photo for children of the Septima Clark Public Charter School during the Joint Service Open House 2012. This year's JSOH celebrates the Centennial of Marin Corps Aviation. JSOH 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.