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Old 12-13-2017, 7:48 AM
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popnokick popnokick is offline
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Location: Northeast PA
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The siren with the "very low growl and rumble" was probably a Federal Signal Thunderbolt. The horn actually rotated 360 degrees continuously when it was activated. Detailed pic here -
https://en.wikipedia.org/wiki/Civil_..._1003_head.jpg
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