Jeremy Bowen: Syria feels lighter without the Assads' crushing weight - but now there are new problems

A rebel force had broken out of Idlib, a Syrian province on the border with Turkey, and was storming towards Damascus. It was led by a man known as Abu Mohammed al-Jolani, and his militia group, Hayat Tahrir al-Sham (HTS).

Jolani was a nom-de-guerre, reflecting his family's roots in the Golan Heights, Syria's southern highlands, annexed by Israel after it was occupied in 1967. His real name is Ahmed al-Sharaa.

One year later, he is interim president, and Bashar al-Assad is in a gilded exile in Russia.