signs the United Nations proclamation of the March equinox (March 21) as Earth Day. February 27 – Doctors in the first Dutch abortion clinic (Mildredhuis in Arnhem) start to perform abortions. February 28 – Evel Knievel sets a world record and jumps 19 cars on a motorbike in Ontario, California. March March 1 A bomb explodes in the men's room at the United States Capitol; the Weather Underground claims responsibility. Pakistani president Agha Muhammad Yahya Khan indefinitely postpones the pending National Assembly session, precipitating massive civil disobedience in East Pakistan. Canadian John Robarts ends his term of office as the 17th Premier of Ontario. March 2 – Awami League leader Sheikh Mujibur Rahman launched the non-cooperation movement in East Pakistan. March 4 – The southern part of Quebec, and especially Montreal, receives 16½" (42 cm) of snow in what becomes known as the Century's Snowstorm (la tempête du siècle). March 5 The Pakistani army occupies East Pakistan. In Belfast, a Led Zeppelin show includes the first public performance of "Stairway to Heaven," a song from the band's fourth album. March 6 – A fire in a mental hospital in Burghölzli, Switzerland kills 28 people. March 7 Die Sendung mit der Maus airs its first episode on Das Erste. The British postal workers' strike, led by UPW General Secretary Tom Jackson, ends after 47 days. Sheikh Mujibur Rahman, political leader of East Pakistan (modern day-Bangladesh), delivers a public speech at the Racecourse Field in Dhaka calling for masses to be prepared to fight for national independence. March 8 The Citizens' Commission to Investigate the FBI breaks into the Media, Pennsylvania offices of the Federal Bureau of Investigation and removes all of its files. "Fight of the Century": Boxer Joe Frazier defeats Muhammad Ali in a 15-round unanimous decision at Madison Square Garden. March 10 – William McMahon replaces John Gorton as the Liberal/Country Coalition Prime Minister of Australia after Gorton resigns following a vote of confidence that was tied 33-all. March 11 – THX 1138, George Lucas' first full-length film, premieres in theaters. March 12 – Hafez al-Assad becomes president of Syria. March 12–13 – The Allman Brothers Band plays their legendary concert at the Fillmore East. March 16 – Trygve Bratteli forms a government in Norway. March 18 – A landslide in Chungar, Peru crashes into Yanawayin Lake, killing 200. March 23 – General Alejandro Lanusse of Argentina takes power