text:  This is All Things Considered from NPR News. I'm Elsa Chang in Culver City, California. And I'm Ari Shapiro in Washington. American officials are keeping a close eye on Israel's northern border with Lebanon in fear another war could break out there between Israel and Hezbollah militants. Some countries are now telling their citizens to evacuate Lebanon and airlines are canceling flights. In a few minutes, we'll get the latest on diplomatic efforts to stave off another war in the Middle East.