| 21. | Natural uranium is about 0.7 percent uranium-235.
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| 22. | MOX combines plutonium and uranium oxide recycled from spent nuclear fuel.
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| 23. | Rumors of a secret enriched-uranium project persisted, however.
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| 24. | Other chemicals then separate the plutonium from uranium and other impurities.
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| 25. | Enriched uranium is also a basic fuel for civilian nuclear reactors.
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| 26. | Enriched uranium is a key component in creating a nuclear bomb.
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| 27. | It also agreed to suspend enriching uranium to earn international confidence.
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| 28. | Khan directed Pakistan's uranium enrichment program for 25 years.
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| 29. | The Paducah plant is the only domestic source of uranium enrichment.
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| 30. | The area is said to contain gold, uranium and oil.
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