If you set $facebook in header. Php you won't be able to access it in index. Php unless you globalise it.
Once you include the facebook client in your header. Php file and create an instance of that.
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.