UITableView UITableViewController Detail View and UISegmentedControl how?

No, you can't add the control in prepareForSegue, because the destination controller's view hasn't been loaded yet at that time. Doing it in viewDidLoad is fine. I don't know what you mean by "I need to call back into TableViewController to act on it".

What is the purpose of the segmented control?

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.