NEW : U.S. defense forces : Iraq 's largest province in trouble amid ISIS onslaught . ISIS controls vast swaths of Iraq , Syria and is threatening to take even more land . Speaking to reporters during his travels in South America , U.S. Defense Secretary Chuck Hagel said there 's a lot of uncertainty about what will happen with Anbar province , which is just west of Baghdad . Iraqi official : ISIS fighters in Anbar province , near Baghdad , may cut off Iraqi forces . Syria : ISIL now controls about half of Kobani , a Syrian city near the Turkish border .
NEW : U.S. defense forces : Iraq 's largest province in trouble amid ISIS onslaught . ISIS controls vast swaths of Iraq , Syria and is threatening to take even more land . Iraqi official : ISIS fighters in Anbar province , near Baghdad , may cut off Iraqi forces . Syria : ISIL now controls about half of Kobani , a Syrian city near the Turkish border .