[processing please hold]

No, but he is and was the head of Al Queda. He made the declaration on the organization's behalf.

So, if the head of the Boy Scouts declared war on us, we could capture and hold all their members? It was a facetious question.

Al Queda is an organization, not a country.

[lepton]

So, if the head of the Boy Scouts declared war on us, we could capture and hold all their members?

The Boy Scouts are not analogous to Al Queda, nor are its members specifically devoted to the goals of it's head.

Again, refer to the Barbary Pirates. Organizations can indeed declare war upon us, and the precedent is that if the President deems them a danger to the nation he can carry out a war against them with no further declaration - theirs sufficed.