This handout photo provided by Syria’s Interim Government shows UN Special Envoy Geir Pedersen meeting with Hayat Tahrir al-Sham leader Abu Mohammed al-Jolani, now using his real name Ahmed al-Sharaa in Damascus on Dec. 15. The Syrian Islamist leader whose group led the offensive that toppled Bashar al-Assad met Sunday with UN envoy Geir Pedersen, who was visiting Damascus.