Donald Trump wants a historic deal with Iran. The problem is that some of the biggest obstacles aren't in Tehran or Washington. They're on the border between Israel and Lebanon. 

In this two-part special, we trace the conflict that keeps dragging the region back into crisis. From Israel's invasion of Lebanon and the creation of a security zone in the south, to the rise of Hezbollah and years of cross-border fighting, this frontier has remained one of the Middle East's most dangerous flashpoints. More recently, Hezbollah attacks forced tens of thousands of Israelis from their homes, challenging assumptions about security in the country's north. 

As diplomats pursue a new agreement with Iran, one question looms large: can this conflict be contained, or will it derail the deal before it's signed? 

Listen to our 2023 episode on the history of Hezbollah: https://www.abc.net.au/listen/programs/if-youre-listening/who-is-hezbollah-the-group-backing-hamas/103040512

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Check out our series on YouTube: https://www.youtube.com/playlist?list=PLDTPrMoGHssAfgMMS3L5LpLNFMNp1U_Nq