1.   And nuclear explosions deep underground make telltale depressions at the surface, the tracking of which could aid arms control.

2.   Before that, though, there were all sorts of underground explosions and seismic upheavals.

3.   Boyd and his fellow miners died when they attempted an unsuccessful rescue of another miner trapped after an underground explosion.

4.   After India set off five underground nuclear explosions earlier this week, Clinton cut off all U.S. financial aid, except humanitarian assistance.

5.   All those warhead checks continue under the Stockpile Stewardship Program, except for the underground explosions.

6.   But Americans should understand that it was the West, particularly the United States, that built the policy road leading to the Indian underground explosions.

7.   Clinton announced the sanctions Wednesday to punish India for detonating underground nuclear explosions.

8.   Currently, limited treaties restrict nuclear tests to underground explosions.

9.   In addition, it would remove one incentive for having a nuclear arsenal -- to display it in underground explosions for political leverage.

10.   It became evident last month that Pakistan plans to conduct its first underground nuclear explosion at its Chagai test area.