What part of convene military tribunal can your dim mind not understand? The SC merely said that you, the President of the United States under the laws of the United States which allow for the convening of Military Tribunals, should convene said military tribunal (as you always used to do) and find that said terrorist is a terrorist. Then you can lock him away forever as far as we are concerned..
Absent you the President of the United States, convening a lawfully consituted military tribunal, which you have legal authority to do, and always used to do to determine that said terrorist is said terrorist, you are going to be subject to a writ proceeding . The simple way that you, the President of the United States can avoid a writ proceeding is to convene a military tribunal, which you have the legal authority to do, and determine that said terrorist is a terrorist and not an American citizen who happened to be on vacation in the wrong place.
What part of convene a military tribunal and find the guy guilty of being a terrorist or unlawful combattant does your feeble mind not understand?