Trapped Steamer News Today

Live in washington to explain what this is all about. >> reporter: thats right. in his election campaign, iranian president rouhani said death to america is easy. we need to express death to america with action. a lot of experts worry the u.s. is vulnerable to such a threat, especially one carried through an emp blast or electromagnetic pulse contained in low yield nuclear bombs. it could disable our entire electrical grid. >> a scenario that could envision a missile being launched off of a ship...