>> one big shrug of the shoulders. al qaeda is threaten to go kill americans. really? listen. >> i don't want to oversimplify it or say it's like a elvis sighting but bin laden comes out with another audiotape. let's kill more inif a if a dells. >> you u.s. official echoed to sentiments. a counterterrorism official suggested if bin laden wants to be involved in the legal proceedings, he should show up in an american court. >> that's not likely to happen. intelligence officials follow this. what are they saying about the tapes? >> they don't regard it aspiration -- operationally significant. they say he's less significant than five years ago.