text:  Israeli and Hamas negotiators are meeting in Qatar to discuss a potential ceasefire in the 10-month-old Gaza war. One of the key issues is the release of Israeli hostages held by Hamas and Palestinian prisoners held by Israel. But Hamas says it doesn't have all the hostages. NPR's Jane Araf sat down with a Hamas official in Beirut today and has more. We meet Ahmed Abdel Hadi in the Hamas offices in the southern suburbs of Beirut.