AlQa'dah 18, 1432, Oct 16, 2011, SPA - Mayor of Riyadh Region Prince Dr. Abdul-Aziz Bin Mohammed Bin Ayyaf received here today a delegation of mayors of some cities of the United States of America. During the meeting, they exchanged cordial talks and reviewed the existing cooperation between the Kingdom and the United States in various fields. During their visit to the Kingdom, the U.S. delegation will view civilizational and administrative development in the Kingdom and will visit monuments and historical and cultural sites, as well as development and economic projects.