Use the UIScrollViewDelegate's scrollViewDidEndDecelerating: method. There's also scrollViewWillBeginDecelerating: to inform you that the scrollview is now slowing down.
Two things to remember here. First of all, set the delegate for the UIScrollView. Then implement your desired behavior in one or both of these delegate methods.
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.