Two things, are they unsure the attack could have worked the way they describe, or are they unsure the attack actually happened that way? From the viewpoint of

Two things, are they unsure the attack could have worked the way they describe, or are they unsure the attack actually happened that way? From the viewpoint of the public it would be important to know what made this attack possible, and how to defend against it, even if the actual attack was accomplished some other way. I guess what I'm asking is, do they know how to repeat this attack?