Kind of off topic, but I know there are a few military hardware geeks on this forum.
It appears that in the Bin Ladin raid, the US has used a previously unseen stealth helicopter technology.
http://www.latimes.com/business/la-f...,3245795.story
Quote:
When a U.S. military helicopter was destroyed in the backyard of Osama bin Laden's compound, it left not only a pile of smoldering wreckage but tantalizing evidence of a secret stealth chopper.
The quest for a helicopter that can slip behind enemy lines without being heard or detected by radar has been the Holy Grail of military aviation for decades and until this week nobody had thought such a craft existed.
But aviation experts are now convinced that the Pentagon may have developed such an aircraft. They say the U.S. military went to extraordinary lengths to protect its new technology by destroying a helicopter that had been damaged in the raid, either during the initial landing or in the subsequent evacuation.
A section of the craft also survived intact, and photos of it leave no doubt in analysts' minds that the U.S. had modified a MH-60 Black Hawk into some kind of super-secret stealth helicopter — the likes of which have never been seen before.
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