Around 100 U.S. troops will soon be on active duty in Israel to help defend the country against the potent missile threat from Iran and its regional allies, most notably Hezbollah in Lebanon. The THAAD deployment is both a political and military signal ahead of Israel's expected retaliatory attack on Iran,

About 100 U.S. troops are expected to deploy to Israel, drawing the U.S. more deeply into the complex war playing out in the Middle East.