For two decades, the United Nations has stationed peacekeepers along Lebanon's southern border to hold a fragile line between Israel and Hezbollah — a militant organization born from conflict in 1982 and sustained by Iranian support ever since. UNIFIL's expanded mandate is not a resolution but a recognition: that some conflicts, left unwatched, do not cool on their own. The monitors who work in that compressed border geography are, in a sense, the international community's admission that peace sometimes requires a witness.