Iran vows revenge after Hamas leader Ismail Haniyeh killed BBC.comHamas political leader Ismail Haniyeh killed in Iran CNNIsrael war on Gaza live: Regional conflict fears after Haniyeh assassinated Al Jazeera EnglishIran’s Ayatollah Ali Khamenei orders ‘direct’ attack on Israel: report Fox NewsHamas political leader and Hezbollah commander killed hours apart. Here’s what we know about rising Middle East tensions. Yahoo! Voices