As the senior deputy to ISIS leader Abu Bakr al-Baghdadi, al-Hayali was the primary coordinator for moving large amounts of weapons, explosives, vehicles and people between Iraq and Syria, where IS militants control vast amounts of territory.The US is leading a coalition of countries that have spent the past year striking at IS militants, weaponry and machinery from the air but has made little progress in meeting President Barack Obama’s goal to “degrade and destroy” the group, which has also beheaded hostages, including some Americans.