Error : “_OBJC_CLASS_$_NgnEngine?

It sounds like you're using a static library built for the device (armv7, armv7s architectures) and now you try to use it in the iPhone simulator that requires i386.

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.