1974: A powerful bomb explodes at the Mitsubishi Heavy Industries headquarters in Marunouchi, Tokyo. Eight are killed, 378 are injured. Eight left-wing activists are arrested on May 19, 1975 by Japanese authorities.
1974: A Belgrade-Dortmund express train derails at the main train station in Zagreb killing 153 passengers.
1962: Japan conducts a test of the NAMC YS-11, its first aircraft since World War II and its only successful commercial aircraft from before or after the war.