Air And Military Museum of the Ozarks
On my way to the Oklahoma D-Day Paintball event I stopped at this Museum to see what it was. It is an interesting privately funded museum located in Springfield, MO. They have a couple of interesting items including a Cobra Helicopter and a 50's era jet which I can't think of right now.
While I was in Springfield I also stopped at the Surplus City store and they had some kind of howitzer turret on display. They had some good surplus items there, including many WWII items.