I used to have ready and easy access of Aviation Week and it is a guilty pleasure of mine to read interesting articles in it. Here are a few articles,
* “Stealth Helos Used In Osama Raid” (with photos)
“Well, now we know why all of us had trouble ID’ing the helicopter that crashed, or was brought down, in the Osama raid.
It was a secretly developed stealth helicopter, probably a highly modified version of an H-60 Blackhawk. Photos published in the Daily Mail and on the Secret Projects board show that the helicopter’s tail features stealth-configured shapes on the boom and tip fairings, swept stabilizers and a “dishpan” cover over a non-standard five-or-six-blade tail rotor. It has a silver-loaded infra-red suppression finish similar to that seen on some V-22s. “
* ABC News, “Analysts: bin Laden raid reveals stealth copter“