1891 – Birth of Rudolf Berthold, German World War I flying ace.
1918 – British World War I fighter ace John Lightfoot Trollope of the Royal Flying Corps No. 43 Squadron shoots down seven German aircraft in his Sopwith F.1 Camel.
1939 – American pioneer aviatrix Jacqueline Cochran achieves a woman’s altitude record of 30,052 ft. 5 in. over Palm Spring, Calif., in a Beechcraft Model 17.
1943 – Death of Harvey Weir Cook, American World War I flying ace, World War II pilot and U.S. aviation pioneer; Cook is killed in the crash of his Bell P-39 Airacobra due to cloudy weather in New Caledonia.
1948 – The first aircraft to fly with a single turboprop engine is a British trainer Boulton Paul P.108 Balliol (shown); it is powered by an Armstrong Siddeley Mamba.
1999 – NATO commences air bombardment against Yugoslavia, marking the first time the military alliance has attacked a sovereign country.