A fighter with the US-backed Syrian Democratic Forces (SDF) keeps a position during an operation to expel Islamic State group (IS) jihadists from the Baghouz area in the eastern Syrian province of Deir Ezzor on February 13, 2019. - Syrian fighters backed by artillery fire from a US-led coalition battled a fierce jihadist counteroffensive as they pushed to retake a last morsel of territory from the Islamic State group in an assault lasting days. More than four years after the extremists declared a "caliphate" across large parts of Syria and neighbouring Iraq, several offensives have whittled that down to a tiny scrap of land in eastern Syria. (Photo by Fadel SENNA / AFP)