Trucks in an international humanitarian aid convoy arrive from territories controlled by the Syrian government in the city of Saraqib and crossing into areas held by the Syrian "Hayat Tahrir al-Sham" (HTS) rebel-group in the northwestern Idlib province. The aid delivery mechanism across Turkey's border into rebel-held Syria at the Bab al-Hawa crossing is the only way UN assistance can reach civilians without navigating areas controlled by Syrian government forces. IMAGES