ruhle. we are learning more today of the intelligence work that led up to the raid against isis leader abu bakr al-baghdadi, northern syria compound. u.s. middle east based officials knowledgeable of the operation told the washington post that the informant cultivated ahead of the raid was a person facilitated baghdadi s movement in syria and helped oversees construction work on his syrian safe house. the mold details knowledge of baghda baghdadi s whereabouts proved to be critical in the raid. joining me now, he spent more than two decades covering international affairs. bob bobby, thank you for being here. let s talk about what it means for isis. how big a deal is this? the context in which i asked you about this is when osama bin laden was killed, everybody in the world knew osama bin laden s