Turkey on a 'Collision Course' With the U.S. After Striking Kurdish Militias

A series of Turkish airstrikes targeting American-allied Kurdish militias in Iraq and Syria threaten to put Turkey and the United States on a "collision course," experts have warned.

Syrian activists said the attacks, on Sinjar Mountain in northern Iraq and a mountainous region in Syria, killed at least 18 members of the Syrian Kurdish militia known as the People's Protection Units, or YPG, which are at the center of bitter divisions between the two NATO allies.

The U.S.