On Tuesday , 90 arrived from outside the country , said Pentagon spokesman Rear Adm. John Kirby . Militants , who may number up to 10,000 , are `` increasingly capable , '' U.S. official says . The militants have been able to seize territory in the north and west of Iraq since they began their insurgency last year, but Iraqi forces have struggled to dislodge them. John Kerry visits Irbil to speak with Kurdish leaders about the Iraq crisis . The U.S. is `` extraordinarily hampered '' without a new Iraqi government , Kerry says .
Militants , who may number up to 10,000 , are `` increasingly capable , '' U.S. official says . The militants have been able to seize territory in the north and west of Iraq since they began their insurgency last year, but Iraqi forces have struggled to dislodge them. John Kerry visits Irbil to speak with Kurdish leaders about the Iraq crisis . The U.S. is `` extraordinarily hampered '' without a new Iraqi government , Kerry says .