Every year, more than 10,000 aircraft fly to Wisconsin for EAA AirVenture Oshkosh. Of those, nearly 3,000 are showplanes — vintage aircraft, warbirds, homebuilts, aerobatic airplanes, etc. — that are displayed around the grounds. But some visitors may notice other airplanes parked here and there that didn’t fly in at all, because they’re part of […]