1st » Nuclear testing: The Castle Bravo, a 15-TNT equivalent e.g megaton hydrogen bomb, is detonated on Bikini Atoll in the Pacific Ocean, resulting in the worst radioactive contamination ever caused by the United States.
1st » Puerto Rican independence movement named Puerto Rican nationalists attack the United States Capitol building, United States Capitol shooting incident (1954) e.g injuring five Representatives.
9th » McCarthyism: CBS television broadcasts the 'See It Now' episode, "A Report on Senator Joseph McCarthy", produced by Fred Friendly.
13th » First Indochina War: Viet Minh forces under Vo Nguyen Giap unleashed a massive artillery barrage on the France named French to begin the Battle of Dien Bien Phu called Battle of Điện Biên Phủ, the climactic battle in the First Indochina War.
19th » Joey Giardello knocks out Willie Tory in round seven at Madison Square Garden (1925) or Madison Square Garden in the first television known as televised prize boxing fight shown in colour.
19th » Willie Mosconi sets a world record by running 526 consecutive balls without a miss during a straight pool exhibition at East High Billiard Club in Springfield, Ohio. The record still stands today.
22nd » Closed since 1939, the London bullion market reopens.
30th » The Yonge–University–Spadina line e.g Yonge Street subway line opens in Toronto. It is the first rapid transit known as subway in Canada.