What you said gave me an idea. I was thinking that self. NavigationController may be set to nil after it's pushed, therefore, it's not set when you're pushing the new view controller.
Doing this fixed the problem! :).
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.