Is Lebanon the key to peace in the Middle East?

<p>The shaky ceasefire between Iran and the US has been extended. Whether it lasts much longer or fighting resumes depends partly on Lebanon, where another fragile truce has been struck between Israel and the Iranian proxy group Hezbollah. So why is Lebanon so important to peace with Iran? And what happens if the ceasefire fails?&nbsp;</p><br><p><em>This podcast was brought to you thanks to the support of readers of The Times and The Sunday Times. Subscribe today: </em><a href="http://thetimes.com/thestory" rel="noopener noreferrer" target="_blank"><em>http://thetimes.com/thestory</em></a></p><br><p><strong>Guest: …