SINGAPORE (AP) — U.S. military leaders are searching for ways to bolster the Iraqi forces following the Islamic State group's takeover of Ramadi earlier this month, Defense Secretary Ash Carter said Thursday, highlighting the importance of training and equipping the Sunni tribal militias. Days after making the startlingly frank assessment that the Iraqi forces lack "the will to fight," Carter told reporters en route to Singapore with him that he called a special meeting of top military advisers and asked them to come up with options. [...] a senior defense official said Carter had ruled out providing weapons and training directly to the Sunni fighters and still wants to work through the Iraqi government, an approach that has been ineffective so far. In January, the Iraqi government held an inauguration ceremony for a few hundred Sunni fighters in Anbar province with the hope that it would plant the seed for an expanded national guard, in which Sunnis would take on responsibility for security in Iraq's Sunni areas, which are predominantly under Islamic State control today. The Obama administration has so far shown no inclination to commit more U.S.