Medical technicians walk around to assist visitors during the Joint Service Open House on Joint Base Andrews. They had everything from basic chapstick to ear plugs. The aid station is also prepared to provide emergency care at the JSOH. This year's Joint Service Open House celebrates the Centennial of Marine Corps Aviation. JSOH affords the public an opportunity to meet the men and women of the Armed Forces while viewing over 100 static displays and 19 aerial demonstration teams. (Air Force Photo/Melanie Moore)