coast of yemen there to block the iranian vessels from delivering arms to rebels inside yemen. iranian backed houthis is backed by the u.s. and saudi arabia. the commander of the iran navy said we don't let anyone give us warnings and threats. our senior correspondent nick paton walsh is monitoring the developments for us. >> reporter: john so much more at stake day by day in the waters around yemen and skies above it. the u.s. saying it will send aircraft carrier "uss theodore roosevelt roosevelt" and "uss normandy." iran is suspected to have nine ships in the area who may be carrying weapons that may be bound for yemen.