May 29, 1944

The concept of the “frangible” bullet (a ceramic filled round developed by Bakelite Corp. and Duke University that disintegrates on impact) for aerial gunnery training is tried out for the first time at Buckingham Field, Fla. Capt. Charles T. Everett flies a heavily armored A-20 nicknamed Alclad Nag, and is fired on in mid air by a gunner in the top turret of the Boeing YB-40, a heavily armed B-17.