I don't know anything about aviation..but I did see a show years ago about a new prototype US helicopter...and the first image on Wired, to me, 100% reminded me of it. Googling, I'm sure what I'm talking about is the RAH-66 Comanche.
http://en.wikipedia.org/wiki/Boeing/Sikorsky_RAH-66_Comanche
Do a google images search, the thing looks [relatively] identical.