The Biden administration is concerned the fragile ceasefire in Lebanon could unravel after Israel and Hezbollah exchanged fire in recent days, U.S. officials say. Why it matters: The ceasefire announced last Tuesday ended more than a year of fighting between Israel and Hezbollah.

Under the agreement, Israeli troops would withdraw from southern Lebanon while Hezbollah would move its forces further away from the Israeli-Lebanon border.

The question is whether the cease-fire in Lebanon that Biden announced Tuesday will be the coda to his diplomatic efforts in the Middle East or a steppingstone to agreements that could at last end the devastating war in the Gaza Strip and potentially even set the stage for a broader regional transformation.