U.S. bombers have arrived in the Middle East region as tensions flare over Iran potentially launching another attack on Israel. Pentagon officials earlier said that B-52 long-range bombers, along with more destroyers, fighter squadrons and tankers, would be deployed to the region to deter Iran and its militant allies. Iran's Supreme Leader Ayatollah Ali Khamenei on Saturday threatened Israel and the U.S. with 'a crushing response' following Israeli strikes on Oct. 26 that targeted military bases and other locations and killed at least five people in the Islamic Republic.