just because the air strikes are ending doesn t mean the fighting has stopped. a fierce battle broke out monday in the city of taez. in the city of taiz. fighters loyal to the president exchanged machine gun and rocket fire with houthi rebels. the group s commander vowed to drive the houthi back to their caves. u.s. president barack obama is warning iran against shiching weapons to houthi rebels in yemen. he says the message to tehran has been clear and direct. it comes as the u.s. started monitoring iranian ships off the coast of yemen. chief u.s. security correspondent, jim sciutto has more on that.