| 11. | You just don't play around with plutonium ."
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| 12. | So the red clay might have suppressed the movement of plutonium.
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| 13. | The Cassini plutonium is mostly an isotope called plutonium-238.
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| 14. | The Cassini plutonium is mostly an isotope called plutonium-238.
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| 15. | Cassini will use Plutonium 238 to power its instruments after launch.
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| 16. | Plutonium ` pyroprocessing'( $ 100 million over four years)
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| 17. | While protesters chanted " no plutonium in space,"
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| 18. | In one of the accidents the plutonium was recovered and reused.
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| 19. | NASA officials have said all along that the plutonium was safe.
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| 20. | It is plutonium's natural decay that will generate electricity.
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