US Defense Secretary Ashton Carter met with the King and his Arabian military counterpart, Deputy Crown Prince Mohammad bin Salman, at Jeddah to answer regional security concerns in the Kingdom and the Gulf states over lifting Iranian economic and conventional military sanctions as the Joint Comprehensive Plan of Action outlines. The King has misgivings over the deal since it would increase the regional power of Iran especially in the proxy conflicts in Syria, Yemen, and elsewhere. In January 2016, Saudi Arabia executed the prominent Saudi Shia cleric Sheikh Nimr. Iran warned that the House of Saud would pay a high price for the execution of Sheikh Nimr by God's will.