Islamic State fighters are regrouping in a remote stretch of eastern Iraq, aiming to revive their fortunes after the defeat of their caliphate early this year. “They are posing a real threat to people’s lives,” warns Maj. Aram Darwani, second from right, of the Kurdish peshmerga military forces. Meanwhile, in cities such as Raqqa in Syria, once the caliphate’s capital, secret Islamic State cells carry out bombings and assassinations. Even as the city strives to rebuild from the last war with the militants, local security forces are struggling to prevent their return. KULAJO, Iraq — In caves tucked into craggy cliffs and tunnels dug deep beneath the desert, the remnants of a vanquished army are converging for what they hope will be the next chapter in their battle for an Islamic State. Hundreds and perhaps thousands of Islamic State fighters have made their way over recent months into a […]