| 31. | According to NASA, SHIMMER will track the CARE dust cloud for days or even months.
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| 32. | Inside an EGG the gas and dust are denser than in the surrounding dust cloud.
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| 33. | I stop, the other dust cloud stops too.
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| 34. | Then, this dust cloud starts mushrooming up Broadway.
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| 35. | The dust cloud, which is dissipating, is too high to affect air quality on the ground.
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| 36. | But then I started to see the smoke and the dust clouds from the North Tower.
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| 37. | The Marines ran through a dust cloud and found four comrades bleeding from a roadside bomb.
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| 38. | Why look at particles suspended in dust clouds?
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| 39. | A vegetable seller waters down the dirt with a garden hose to quell the dust clouds.
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| 40. | The dust cloud funneled through the surrounding streets.
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