Jim
I agree. The WMD were the imminent threat. The ability to hand a WMD to terrorists at any moment, or an "urgent" threat in the ability to use WMD, is the imminent threat.
How simple is that? Not simple enough for some, apparently, who seem to believe that if you say "a metallic bladed implement for digging" then you haven't said "spade".
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1