Why is the US withdrawing its troops from Iraq?

“Why is the US withdrawing its troops from Iraq?”

A US-led coalition deployed in Iraq more than a decade ago to fight jihadists concluded its mission on Wednesday, a move celebrated by the country's leaders, but which some fear will embolden pro-Iran armed factions. France 24's Angela Diffley takes a look at the security challenges facing the country and why the US has chosen this moment to take its troops out.