The Soviet Union would halt atmospheric testing less than two months later, the last explosion being on Christmas Day.

At the United Nations yesterday, President Clinton called on the world to halt nuclear testing and ban the production of fuels for nuclear weapons.

The decision to resume the tests has been criticized by the United States, Britain and Russia - nuclear powers that have all halted testing.

Landowners sued workmen for trespassing and sought injunctions to halt testing they said was disrupting a wintering area for deer.

Depending upon the severity of a failure, the framework may halt subsequent testing.

After one patient died from convulsions, the company halted further testing.

Except for a bout of talks in the late 1970's, neither of the two superpowers has tried to halt nuclear testing since 1963.

He did not propose to halt nuclear testing.

The U.S. and Russia have halted nuclear testing but have yet to conclude a formal ban.