1923 – Birth of Ron Flockhart, Scottish racing driver and pilot.
1929 – Evelyn “Bobbi” Trout flies a 90-horsepower Golden Eagle Chief to an altitude of 15,200 feet, breaking the light class aircraft altitude record.
1946 – First flight of the Lavochkin La-9 (shown), a post-World War II Soviet fighter.
1955 – As part of an attempted coup against president Juan Perón, Argentine’s military bomb and strafe the Casa Rosada in Buenos Aires and the adjacent Plaza de Mayo while a large crowd is gathered there to express support for Perón, killing 364 people and injuring more than 800. The bombing of Plaza de Mayo is the largest aerial bombing ever to take place in mainland Argentina.
1967 – Death of Pierre Marie Gabriel Vincent Ernest Leroy de Boiseaumarie, French World War I flying ace.
2011 – The Russian Federation’s flag carrier Aeroflot puts its first Sukhoi Superjet 100 into service.