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| | Nuclear Terrorism - FAQs (Site not responding. Last check: ) |
 | | Nuclear material with much lower concentrations can be used in nuclear weapons, however -- and is sometimes referred to as "weapons-usable." At uranium concentrations less than 20 percent, producing an explosive chain reaction is almost impossible. |
 | | States forgo nuclear weapons for a number of reasons: inadequate national resources, technological constraints, the international nuclear taboo, international treaties, domestic politics, international inducements, security assurances, aid, threats of sanctions and coercion, and the limited strategic utility of nuclear weapons. |
 | | Moscow's assurance that "all nuclear weapons are in place" is wishful thinking since at least four nuclear submarines with nuclear warheads sank and were never recovered by the Soviet Union. |
| www.nuclearterrorism.org /faq.html (2582 words) |
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