This morning I took the boys to the airport to see three WWII vintage airplanes - a B-17, a B-24, and a P-51 Mustang. The planes were in Billings as part of the Collings Foundation's Wings of Freedom tour. Information on the history of these particular airplanes can be found on the foundation's website; the B-17 here, the P-51 here. The B-24 link doesn't work right now, but I have a photo below of a placard that was next to the airplane.
This is the B-17.
The B-24 was laid up with some engine work, but we were still able to walk through.