11.   He also played a significant role in developing certain advanced missile warheads and in devising ways to detect underground nuclear tests.

12.   I witnessed and filmed the event of the powerful underground nuclear test.

13.   If Russia did conduct an underground test, it would have violated the spirit, though not the letter, of the treaty.

14.   India already held an advantage in conventional weaponry, and was following its underground tests with statements threatening nuclear blackmail.

15.   Indeed, after the tests, India stated that it will henceforth observe a voluntary moratorium and refrain from conducting underground nuclear test explosions.

16.   India recently conducted underground nuclear tests.

17.   New Mexico is still up and running after absorbing enough underground nuclear tests to turn the toilet water eternally blue.

18.   Pakistan set off five underground nuclear tests, heightening tensions with India and disapproving Western nations.

19.   Paris invokes the familiar explanation that it needs to conduct a limited number of low-yield underground tests to insure the reliability of its stockpile.

20.   President Clinton on Wednesday slapped economic sanctions on India, which defied world opinion by setting off two more nuclear devices in a second round of underground tests.