US Secretary of State Marco Rubio has described Iran's demands as 'unacceptable' and 'ridiculous', saying recent negotiations with Tehran have not been very productive. Rubio also defended Washington's position on regional security, warning that the US would act if American forces faced any threat. #USIranWar #USIranDeal #MarcoRubio #Iran #DonaldTrump #USIranTensions #IranTalks #USForeignPolicy #MiddleEastCrisis #Tehran About NDTV (English news channel): NDTV is India's Most-Trusted News Broadcaster with the latest updates in news.