tokyo u.s. defense secretary jim mattis say saturday consider hike number u.s. force middle east address iran misbehavior time warn world would ignore iranian activities president donald trump vow aggressive policy tehran administration warn concrete action iran curb ballistic missile program continue support regional proxy conflict unite state announce new sanction friday two days trump administration put iran notice follow ballistic missile test mattis say put iran notice worthwhile give behavior far iran go single big state sponsor terrorism world think wise make certain iran recognize get attention lot people mattis tell news conference tokyo detail remark iran since take pentagon still firmly play idea military buildup see need increase number force middle east time card right say always capability right think necessary unite state already send navy destroyer patrol coast yemen protect waterways houthi militia align iran action washington could take include give great priority rotate aircraft carriers gulf currently u.s. aircraft carrier gulf example u.s. navy believe robust presence help deter move iran block strategic waterway 2008 2010 move prompt critics accuse iran destabilize region islamic republic threaten disrupt oil ship gulf shut strait hormuz attack nuclear sit mattis say ignore iranian behavior something former president barack obama critics routinely accuse work good ignore good dismiss mattis say without cite obama policies white house say late sanction reaction recent events consideration add landmark 2015 deal curb iran nuclear program best interest unite state iran denounce sanction illegal say would impose legal restrictions american individuals entities help regional terrorist group state tv quote foreign ministry statement say affect sanction access u.s. financial system deal u.s. company subject secondary sanction mean foreign company individuals prohibit deal risk blacklist unite state u.s. weigh middle east troop hike iran concern mattis