isis's self-declared capital. there were 300 militants, including al-baghdadi, may have been present. but in the aftermath on the right, there is little sight of a bomb blast. buildings are destroyed very precisely. close-by structures, untouched. >> the bomb site looks very clean. doesn't look like it was subject to the bombing we normally expect from russian, where syrian air forces. >> u.s. officials are adamant they don't know for certain if al-baghdadi is still alive or where he's fighting. as u.s. fighters got closer to raqqa in recent weeks, fighters and leaders have been pushed out of the city, u.s. officials say, many fleeing south. u.s. air strikes and special operations are picking up in that area. but al-baghdadi several months ago is reported west of mosul near the city of baa.