it is not been used and they can anticipate it will have d.n.a. and fibers that will link it to the bombmaker and they can see the advances al qaeda has been able to make in the devices especially with the detonator that failed, because that failed in 2009. shepard: tell us about the guys. reporter: we learned from intelligence sort there is reason to believe the bombmaker is training apprentices so there will not be a single point of failure in the network because they are counting on the fact that ultimately he will get droned. without going it to the specifics, we have to assume with what we have seen in al qaeda in the past, that they do train others to take up where they leave off because they is seen a succession of their top leadership attack successfully and taken off the battlefield for good. reporter: for context as we
because they have seen a success of the top leadership attack successfully taken off the battlefield for good. while the white house confirms that the president knew in early april the homeland secretary insists it was not marking one year since the seal raid. the statement there is no specific credible plot tied to the anniversary of bin laden s death. that is an accurate statement. reporter: on the eve of the anniversary theyished they d statement saying there was no credible plot. it does not make sense to me that the bulletin was put out if the president has been aware of this plot since last month. so there does appear to be an inconsistency there. but perhaps there is a good reason for it. late today, the chair and ranking member of the senate intelligence committee said the leak about the c.i.a. operation is regarded as very