The deadline for a complete Israeli withdrawal from southern Lebanon has come and gone. Tens of thousands of families displaced by 14 months of fighting between Israel and Hezbollah are making their way back to their homes. Israel says it will enforce the ceasefire, but will also act against any Hezbollah threat. So, how will Lebanon's new leadership grapple with Israel's partial withdrawal? And is Hezbollah likely to return to fighting if an Israeli presence continues?