President Truman signs amendments to the National Security Act of 1947, converting the National Military Establishment to the Department of Defense.
In 1941, Gen. Henry H. “Hap” Arnold of the then-U.S. Army Air Corps, personally reviewed a jet engine patented by Sir Frank Whittle flying on a Gloster E.28/39 aircraft. Impressed by its design, Arnold arranged for a Whittle engine to be brought back to the U.S. and tasked General Electric…