I figured it out. This was originally an iPhone app built on iOS 5. Too make it an iPad app, I just duplicated the project and upgraded all the xibs to iPad versions.
I don't know if it's a bug or not, or if it's something to do with the upgrade to iOS 6, but doing it like that messes something up with the MainWindow.xib.
I ran into this same issue, make sure that the app delegate has a self. Window makeKeyAndVisible. That solved it for me.
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.