From this page http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx at the bottom you can see Update: Internet Explorer 10 now supports CORS using XMLHTTPRequest. It means CORS is not handled properly in IE9. Sorry.
They propose some workarounds with proxy in the same article.
From my experience, if both domains are in your control better to use postMessage.
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.