Thanks for posting the pics of the M-50, I had no idea the thing or even the museum existed. Looking closer at the pic, I noticed the familiar lines of it's stable mate......What - the - hell is that doing there? It can't be.....Wait a minute...Those sneaky bastards! I used my Google-Fu to look it up - the Sukhoi T-4 - another new one for me! The B-29, the Concorde, the Harrier, the Space Shuttle, now I find out the B-70 as well.....Oh those Russians! I suppose it is the sincerest form of flattery!