It seems you are assigning where you ought to be copying. I'd have to see more of your code to be sure, but I'm almost certain a copy somewhere would solve your issues.
As stated above, I had the exact same problem. But would now recommend to bypass the useless NSXMLParser (if using it WITH core data!) and using GDataXML instead. GDataXML is modelled on the NSXMLDocument class (which is a more elegant and workable solution to use with core data, only that you can't use NSXMLDocument with iOS).
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.