As url is an attribute of the media:thumbnail element, you need to access it via the attributes dictionary in didStartElement: . The foundCharacters: message (which I assume is where you're accumulating text into workingPropertyString ) is only sent for character data between an element's start and end tags.
To get a media:thumbnail (or and any element value) in a xml file easily, use xpath query. In order to do XPathQuery you can use libxml2.
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.