My dad had the opportunity to buy a B-25 in the late 60's after he finished flying them in the movie Catch-22 (he's on screen for about half a second in the intro take off scene). While my dad's list of "wish I hadn't passed on that." list, that is near the top. Beautiful aircraft. The Commemorative Air Force B-29 FIFI flew over my office building a few days ago. We're on the 19th of 21 floors and heard this roar go over head, spun around in my chair to see the heavy bomber headed south towards downtown. Even from inside the building it was quite the sound. Me loves me some radial engine roar.