A U.S.-born cleric who has encouraged Muslims to kill American soldiers called for the killing of U.S. civilians in his first video released by a Yemeni offshoot of al-Qaida, providing the most overt link yet between the radical preacher and the terror group.

Dressed in a white Yemeni robe, turban and with a traditional jambiyah dagger tucked into his waistband, Anwar Al-Awlaki used the 45-minute video posted Sunday to justify civilian deaths — and encourage them — by accusing the United States of intentionally killing a million Muslim civilians in Iraq , Afghanistan and elsewhere.