You're collection needs to implement ISupportIncrementalLoading. The strategy for handling this scenario changed from the developer preview. I can't find any examples of using this interface in the consumer preview but there is one that targets the developer preview on the metro forums .
Create a ListBox and set its ItemPanel to StackPanel which is ordered horizontally. Then bind ListBox's ItemsSource to an ObservableCollection which keeps your thumbnails. Write a function that populates this ObservableCollection and call this function from somewhere asynchronously with Dispatcher.BeginInvoke.
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.