Sept. 14 (UPI) -- On this date in history: In 1901, U.S. President William McKinley died of wounds inflicted by an assassin eight days earlier. He was succeeded by Vice President Theodore Roosevelt. In 1920, the first live radio dance music was broadcast, carried by a Detroit station and featuring Paul Specht and his orchestra. In 1959, the Soviet probe Luna 2 -- known informally as Lunik 2 -- became the first Earth-launched space vehicle to land on the moon. In 1960, the Organization of