A colonel for the US Air Force who spent seven years flying the type of aircraft that crashed in Cley, north Norfolk, told the Eastern Daily Press that the HH-60G Pave Hawk may hold the US military's "best safety record".
The Pave Hawk may have the best safety record of any helicopter that the United States military has ever owned.
More top news
Cloudy and damp across much of England and Wales, although the rain should turn lighter and more patchy by the afternoon.
A British journalist based in Egypt has been expelled from the country as authorities tighten control over the media ahead.
Airline fees for services such as name changes and airport check-in could be targeted under a new Government clampdown.