president trump who previewed his remarks by tweeting overnight that something very big has happened, unquote. we re covering the death of the taste leader of isis from every angle from the pentagon to the white house to the middle east. let s begin with pentagon reporter ryan browne. what raw learning about the operation and how it came about? reporter: we re told this is a very complex operation that came about from intelligence obtained and collected by the cia and that intelligence helped lead to a u.s. military raid led by delta force we re being told, the elite special forces deep into northwest syria which is hostile territory and there are actors and extremist groups and the russian and regime military has a presence far from where theut military typically operated so they have to have high confidence that al baghdadi was at the location to verify the raid.