Those flat cars loaded with 737 fuselages in the first :15 seconds came from the Spirit Plant here in Wichita. Spirit can't make enough of them. A dozen or so fuselages at a time can be seen waiting on flat cars along K-15 in front of the Spirit factory. I don't have any pictures yet, I should get some. I do have some pictures of the 737 first flight which occurs at Renton, WA where and I took a roll of pictures on a hot day last summer.

737 First Flight