The 39-story U.N. Secretariat was built on the organization's grounds in New York.
President Truman authorized continuing development of the hydrogen bomb — "the H bomb."
The People's Republic Of Korea (North Korea) invaded the Republic Of Korea (South Korea). The U.N. Security Council declared the Communist action a breach of peace and authorized military intervention. U.N. forces — under the command of General Douglas MacArthur — included 62,000 American reservists who were called up for active duty. Communist Chinese troops joined North Korea, forcing a U.N. retreat at the Yalu River along the Manchurian border.
Two Puerto Rican Nationalists were shot by guards when they attempted to assassinate President Truman at Blair House.
Science fiction writer L. Ron Hubbard published the popular self-help book Dianetics: The Modern Science Of Mental Health. His disciples — using the spiritual "technology" from the book — would later organize the tax-exempt Church of Scientology.
Matinee With Bob & Ray, starring Bob Elliot and Ray Goulding, was immensely popular in the six New England States, originating from WHDH Radio in Boston.
Jack Benny made the move from radio to TV.
The Three Stooges (Moe, Larry & Shemp) made their TV debut portraying CBS-TV executives on Ed Wynn's Camel Cigarettes show.
"Mister Television," Milton Berle, received an Emmy for "most outstanding kinescope personality." A kinescope was the predecessor to video tape: a film recorded from video cameras, used to delay or edit programming.