https://www.aopa.org/news-and-media/all-news/2012/january/10/wag-aero-founder-philanthropist-dick-wagner-remembered
Richard "Dick" Wagner, the man behind Wag-Aero, knew airplanes by sound. An uncanny knack for identifying passing aircraft without looking up was among many...
wag aerodick wagnerfounderphilanthropistremembered