Not sure if ya'll have heard about the helicopters that were used in the insert/extraction of the SEALs in the operation to kill Osama...

They wrecked one of them, and instead of leaving the carcass in place like usual, they blew it up. Why? This is a picture of a portion of the wreckage left after the blast:



I certainly don't recognize that as a part of any helo that I know of... May very well be unacknowledged technology. Pretty cool!