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BROWNING, ORVILLE HICKMAN , Air Force, U.S. OverviewPredecessors of, 1907–46Since 1947
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An air bag is an inflatable cushion designed to protect automobile occupants from serious injury in the case of a collision. The air bag i… Vocalization , Many animals communicate with acoustic signals. Crickets rub a hind leg along a row of protruding spikes; rattlesnakes shake a set of beads in their… Henry Harley Arnold , Henry Harley Arnold
Henry Harley Arnold (1886-1950) was one of America's first military aviators. He became chief of staff of the Army Air Forces in…
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