US beefs up security and orders a missile submarine to the Middle East The Associated PressDefense secretary orders submarine to Middle East, accelerates arrival of strike group ahead of anticipated Iran attack CNNU.S. sends submarine to Middle East amid fears of escalation CBS NewsU.S. Sends Carrier, Missile Submarine to Middle East as Iran Tensions Grow The Wall Street JournalU.S. sends more forces and military hardware to the Middle East in anticipation of Iranian attack on Israel CNBC