to help enforce current gun laws. we invite you to join cnn for a special look at guns in the u.s. with president obama. anderson cooper hosts the event on thursday. 1:00 a.m. friday for those of you watching in london, and 9:00 a.m. friday in hong kong, only here on cnn. rigwe turn to the rising tensions in the middle east. iron yarns laun the diplomatic rift is spilling over to neighboring nations. iran accuses saudi arabia of escalating tensions while several arab nations are siding with the saudis. reporter: anger on the streets of tehran. thousands in the iranian capital protest against the execution of a cleric by saudi arabia saturday.