Iran's nuclear deal puts Saudis on edge

By Angus McDowall and Hadeel Al Sayegh RIYADH/DUBAI (Reuters) - Iran's nuclear deal with world powers on Tuesday will make the Middle East a "more dangerous part of the world" if it comes with too many concessions, a Saudi official told Reuters, signaling Gulf Arabs' deep unease at the agreement. The lack of official responses from Saudi Arabia and its Gulf allies reflected huge nervousness about a deal set to end the pariah status of Iran, already Riyadh's main rival for influence across the Mi