March 1: U.S. officials announce that a hydrogen bomb test (Castle Bravo) has been conducted on Bikini Atoll in the Pacific Ocean. - U.S. Capitol shooting incident: Four Puerto Rican nationalists open fire in the United States House of Representatives chamber and wound five; they were apprehended by security guards.

March 9: American journalists Edward R. Murrow and Fred W. Friendly produce a 30-minute See It Now documentary, entitled A Report on Senator Joseph McCarthy.

March 12: Finland and Germany officially end their state of war.

March 13: French troops begin the battle against the Viet Minh in Dien Bien Phu.

March 19: Joey Giardello knocks out Willie Tory at Madison Square Garden, in the first televised boxing prize fight to be shown in color.

March 23: In Vietnam, the Viet Minh capture the main airstrip of Dien Bien Phu. The remaining French Army units there are partially isolated.

March 25: The 26th Academy Awards ceremony is held. - RCA manufactures the first color TV set (12-inch screen; price: $1,000) - The Soviet Union recognizes the sovereignty of East Germany. Soviet troops remain in the country.

March 27: The Castle Romeo nuclear test explosion is executed.

March 28: Puerto Rico's first television station, WKAQ-TV, commences broadcasting.

March 29: A C-47 transport with the French nurse Genevieve de Galard on board is wrecked on the runway at Dien Bien Phu.

March 30: The first operational subway line in Canada opens in Toronto, Ontario. (source: Wikipedia)