Gen Martin E Dempsey, chairman of the US joint chiefs of staff, described the current phase of operations against Islamic State as “extraordinarily complex”. Photograph: Chip Somodevilla/Getty Images

The US air campaign to thwart the advance of fighters from the Islamic State has been the easy part of President Barack Obama’s strategy in Iraq an(...)

UN vehicles transporting a team of experts from the Organisation for the Prohibition of Chemical Weapons are pictured as they return to their hotel in Damascus today. Photograph: Khaled al-Hariri/Reuters

A team of chemical weapons experts has made “encouraging initial progress” as it works towards the elimination of Syria’s poison gas arsenal, the Unit(...)

US secretary of state John Kerry said today there is “clear” and “compelling” evidence that the Syrian government used poison gas against its citizen(...)

UN chemical weapons experts interviewed and took blood samples today from victims of last week’s apparent poison gas attack in a rebel-held suburb of (...)