Saudi Minister of State for Foreign Affairs Nizar bin Obaid Madani speaks during the 9th International Institute for Strategic Studies (IISS) Regional Security Summit in the Bahraini capital Manama on December 7, 2013. Diplomacy with Iran must be backed up by US military might, Pentagon chief Chuck Hagel said in the speech addressed to Gulf allies anxious over a nuclear deal with Tehran. Hagel promised the United States would maintain a 35,000-strong force in the Gulf region, as well as an armada of ships and warplanes, despite the recent deal with Tehran. AFP PHOTO/MOHAMMED AL-SHAIKH