1970    March 5-NPT enters into force; 100 nations ratify it by 1980.

1971    March 30-U.S. deploys Poseidon SLBMs.

1974    May 18-India sets off a low-yield device (10-15kt) under the Rajasthan desert.
	November 24- U.S./U.S.S.R. agree to limit the number of strategic launchers
	(2400) and MIRV launchers (1320).
	France halts atmospheric testing at Moruroa.

1977   	April-President Carter bans the recycling of used nuclear fuel from 
	commercial reactors.

1978	April-The United States cancels development of the neutron bomb, which 
	would theoretically destroy life but leave buildings intact.