On February 18, 1930, "Elm Farm Ollie" became the first cow to fly in an airplane at the St Louis Air Exposition. Ollie was milked in mid-flight and the milk was dropped via parachute over St Louis. Today, February 18th is celebrated as Elm Farm Ollie Day at the Mustard Museum in Mount Horeb, Wisconsin. A few hundred people gather every year to talk cows and milk the story for all it is worth.