DDT was developed to wipe out lice, which had been carrying typhus among the troops of the Allied Forces.
The Normandy Invasion took place on D Day, June 6th.
An American police dog was given the Distinguished Service Medal for charging a machine gun nest in the invasion of Sicily.
President Franklin Roosevelt was elected to his fourth term, defeating Republican candidate Thomas Dewey.
160 persons died - 94 of them children - when a Barnum & Bailey circus tent caught fire in Hartford, Connecticut.
155 people died when a series of tornadoes ripped through Maryland, West Virginia and Pennsylvania.
America's most popular bandleader, Glenn Miller, became a major in the Air Force. Leading the Air Force band, Miller made several pro-Ally broadcasts from London, which were beamed into Nazi Germany. Miller's plane disappeared on a flight from London to Paris on Christmas Eve.
Casablanca was named motion picture of the year at the Academy Awards ceremony.