The site where Hezbollah is fighting off Islamic rebels

In recent weeks, Syrian government forces have been losing ground to rebels or Islamic militants, most recently at Palmyra.

But in one area, the Qalamoun mountains on Lebanon's border with Syria, government forces, along with their allies from the Lebanese Shia movement Hezbollah, have been driving rebel fighters back.

Middle East correspondent Jim Muir visited the strategic site with Hezbollah and found what appeared to be equipment abandoned by Sunni Islamists.