For OS 10.7 + XCode4.3 only open Xcode preferences, select the "Downloads" button, select the "Components" tab of Downloads, highlight "Command Line Tools" and press the install button.
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.