From the world leading BBC "news" website;
Tim Ripley, an aviation expert with Jane's Defence Weekly, told the BBC there were "many possible scenarios" behind the helicopter crash.
He said: "The most common one at low level for aircraft and helicopters is bird strikes.
"If one of these helicopters ingested a bird it would cause a very, very nasty accident.
Heaven spare us from commentary by "experts" like this imbecile. He knows less about helicopters than my Granny!