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Thread: Penetration of the sound barrier revealed by vapour trails
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[quote=TRAVELLERMIKE,235493]These were sent me by a colleague from work, the web-site http://www.airliners.net has many examples, with explanations of the circumstances for the pictures shown. There are also some real-time video clips on YouTube, which show that these events some-times only last for a brief moment.[/quote]
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