See the contentMode of UIImageView as UIViewContentModeScaleAspectFit and UIViewContentModeCenter in display of images in multi-touch-tutorial this was something what you were asking.
Add an imageview for your screen what ever you want, display image on that using.
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.