The Experimental Aircraft Association is celebrating it’s 70th anniversary. The EAA organized with three dozen Milwaukee-area aviation enthusiasts on January 26, 1953. EAA spokesman Dick Knapinski says today the organization has more than 270,000 members and 900 local chapters focused on growing participation in aviation. EAA is known worldwide for its annual fly-in convention, EAA AirVenture Oshkosh, which attracts more than 10,000 aircraft and a total attendance topping 600,000 to Oshkosh in late July each year.