text:  Ari, any Israeli attack on Lebanon could spur Iranian-backed militias to go after U.S. forces in the region, especially in Iraq and Syria, which has happened a number of times. Now, a number of countries have told their citizens to leave Lebanon. Some airlines are canceling flights. And another reflection of U.S. concern, the Pentagon has dispatched more warships to the eastern Mediterranean to prepare for any possible evacuation of the American embassy.