| 1. | Subsequently, the sound barrier was broken by Captain Chuck Yeager in 1947.
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| 2. | Maybe the bullet's speed drops below the sound barrier after a while.
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| 3. | Israeli jets also broke the sound barrier over southern Lebanon on Thursday.
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| 4. | On some jaunts from first to third, Sadler breaks the sound barrier.
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| 5. | __ _ Israeli warplanes break sound barrier over Beirut for second day
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| 6. | Jets roared over Belgrade, breaking the sound barrier but firing no missiles.
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| 7. | If he succeeds, he will break the sound barrier, the report said.
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| 8. | In 1997, a jet car broke the sound barrier on this surface.
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| 9. | Once this ratio nears the sound barrier you start picking up problems.
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| 10. | Sound barrier walls vary in cost depending on the type and quality.
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