ISIS militants are close to entering Kobani, a mostly Kurdish city in northern Syria near the border with Turkey, which the extremist group has been laying siege to for weeks. According to Kurdish officials, U.S. airstrikes have done little to deter ISIS from advancing on the city and militant forces are two kilometers from its center. “Airstrikes alone are really not enough to defeat ISIS in Kobani,” said Idris Nassan, a senior spokesman for the Kurdish fighters. “They are besieging the city on three sides, and fighter jets simply cannot hit each and every ISIS fighter on the ground.” Many fighters who have been defending the town were attempting to cross into Turkey. It appeared a final battle was underway for Kobani, and authorities fear a massacre will ensue if ISIS seizes control. The city is important because ISIS wants to claim a swath of land running from its self-declared capital of Raqqa, Syria, all the way to the Turkish border 60 miles away, as part of its so-called Islamic caliphate.