U.S. Secretary of State John Kerry walks with Saudi Arabia's Foreign Minister Saud bin Faisal bin Abdulaziz Al Saud (L) during a meeting of Gulf foreign ministers at Riyadh Air Base March 5, 2015. Kerry arrived in Riyadh on Thursday to try to reassure King Salman that any nuclear deal with Iran will be in Saudi interests, despite the kingdom's fears that it may boost Tehran's backing for Shi'ite Muslim groups in the region. REUTERS/Evan Vucci/Pool (SAUDI ARABIA - Tags: POLITICS)