1.  And in its new treaty with Russia, the United States insisted on storing weapons rather than destroying them, as it has urged other nuclear states to do.

2.  Backers see the ban blocking new nuclear states and arms races.

3.  A global ban would also stigmatize any would-be nuclear state that tried to test.

4.  After all, this could be a war between nuclear states.

5.  But the officials in Washington admitted that events of the past three weeks have shown that the United States cannot prevent the rise of other nuclear states.

6.  Dr. Goldhaber added to the knowledge of the structure of the nucleus when she found regularities in nuclear excited states.

7.  Five declared nuclear states signed the treaty, which takes effect in two years, in September.

8.  Non-nuclear countries are more easily dissuaded from developing atomic weapons when nuclear states restrain their own arsenals.

9.  No nuclear state has ever fallen victim to civil war, but even without a clear precedent the grim consequences can be foreseen.

10.  Others said the treaty was pointless because it would do nothing to stop the most dangerous nuclear states, North Korea and Iran.