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Content: April 23 
A rally and occupation of the Low administrative
	office building at Columbia University, planned to protest the university's
	participation in the Institute for Defense Analysis is scuttled by
	conservative students and university security officers. The demonstrators
	march to the site of a proposed new gymnasium at Morningside Heights to
	stage a protest in support of neighbors who use the site for recreation. The action eventually results in the occupation of five buildings -
	Hamilton, Low, Fairweather and Mathematics halls, and the Architecture
	building. It will culminate seven days later when police storm the
	buildings and violently remove the students and their supporters at the
	Columbia administration's request. May
May 3
The US and North Vietnamese delegations agree to begin peace
	talks in Paris later this month. The formal talks will begin on May 10. May 6
In France, "Bloody Monday" marks one of the most violent days of the
	Parisian student revolt. Five thousand students march through the Latin
	Quarter with support from the student union and the instructors' union. Reports of the ensuing riot conflict, either the police charge unprevoked,
	or demonstrators harass them with thrown stones. The fighting is intense
	with rioters setting up barricades and the police attacking with gas
	grenades.