Helicopters have one of the most recognizable sounds in aviation. The signature "whop whop" or deep thumping sound announces its arrival long before it appears in the sky. It's a sound so iconic, it's ...
Royal New Zealand Air Force NH90 helicopters fly in formation in this undated photo. (RNZAF photo) WELLINGTON, New Zealand — Two Royal New Zealand Air Force NH90 helicopters have flown from Australia ...
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