Mean Temp 18.5°C 65.3°F at Taegu
May 23, 1950 (Tuesday)
- Harry Gold, an American atomic research scientist believed to have assisted Klaus Fuchs in passing nuclear secrets to the Soviets, was arrested by the FBI in Philadelphia and charged with espionage, with the possibility of receiving the death penalty. Gold's confession implicated David Greenglass, who turned in his own sister, Ethel Rosenberg, and her husband, Julius Rosenberg.
- The Baptist Bible Fellowship was organized.
- Born: William P. Barr, U.S. Attorney General, 1991-1993, in New York City; and Richard Chase, American serial killer nicknamed "The Vampire of Sacramento" (died of suicide, 1980)
Tuesday May 23, 1950
Six HRP–1's and two HO3S–1 helicopters landed on board the USS Mindoro (CVE–120) at Norfolk, Virginia, after which the ship sailed south to a point 15 miles off the coast of Camp Lejeune. The operation lasted only two days during which five HRPs and two HO3Ss carried ashore a total of 120 troops and over 20,000 pounds of cargo. As was the case in Operation CROSSOVER, the exercise afforded good training for the squadron although there were no new techniques of the amphibious assault exhibited. 
But in early May 1950 the American Embassy in Sŏul reported little likelihood of a North Korean invasion in the near future. [04-9]
In May 1950, Army G-2 General Alexander R. Bolling said, "The movement of North Korean forces steadily southward toward the 38th parallel during the current period could indicate preparation for offensive action."
On 23 May, in another routine summary, he stated, "The outbreak of hostilities may occur at any time in Korea and the fall of Indochina to the Communists is possible this year." [04-10]