Since you have a main() function, the App Engine caches your module and imports. Hence within the same runtime, you may call add_models() more than once. If you move the rest initialization code to module level (or into a function that gets called once during module initialization, not during every call to main() ) it should work.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.