You can't pop it over the first because there can only be one instance of colorbox open in a document, you can only replace the first. For the first to re-open when closing the 2nd, you'd have to write a short script to replace colorbox's close method so that it takes a different action instead.
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.