From Justice Thomas’ dissent:

Based on the foregoing, the President’s judgment-?that the present conflict substantially predates the AUMF, extending at least as far back as al Qaeda’s 1996 declaration of war on our Nation, and that the theater of war extends at least as far as the localities of al Qaeda’s principal bases of operations-is beyond judicial reproach. And the plurality’?s unsupportable contrary determination merely confirms that “the Judiciary has neither aptitude, facilities nor responsibility”? for making military or foreign affairs judgments.

You better believe they don’t! That is the sole job of the president, no where in the constitution does it say that Congress or the courts have a right to share that power with the president. That is the way the founders wanted it and no president has ever shared power in that manner. We are at war and the courts have no right to try the detainees. This is not their jurisdiction.
Read more here.
Stop the ACLU has a great roundup of reactions to the news.