Christiane Amanpour speaks with David Vardanyan, son of Ruben Vardanyan, the former leader of the breakaway Nagorno-Karabakh government who is currently being imprisoned by Azerbaijan.Christiane Amanpour speaks with David Vardanyan, son of Ruben Vardanyan, the former leader of the breakaway Nagorno-Karabakh government who is currently being imprisoned by Azerbaijan.