Officials call the attack "massive and unprecedented."
At least 65 suspected terrorists killed. Assaults from both the ground and the sky. And elite, clandestine U.S. forces joining Yemeni commandos in targeting al Qaeda in the Arabian Peninsula - considered al Qaeda's most dangerous affiliate.
But what would make the raid in southern Yemen most significant is if it yielded a target the Americans and the Yemenis have been looking for: Ibrahim al-Asiri, the group's chief bomb maker.
Al-Asiri is among those suspected to have been killed in the Sunday firefight, a high-level Yemeni government official told CNN. But DNA test results are not due for several days.
See the latest on "New Day" at 6am ET and get MORE on CNN.com.