Show her your maturity, don't be a fool and start an argument or fight, just say hi, shake his hand, if you want to say anything to him, tell him how lucky he is. Tell your ex that you think he is a good guy, tell him to take care of her. Be mature, and show them both respect.
Answer If you make a scene you're just telling her that you aren't over it. To prove that you're in charge of your own feelings and that she can't get to you any more, just be friendly and act like you never even went out with her.
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.