There is some concern about Section 1031 and 1032 (PDF) of Senate bill 1867, National Defense Authorization Act for Fiscal Year 2012. The concern is that Americans suspected of terrorism could be detained indefinitely. Here are the key parts from Section 1032.
(1) IN GENERAL- Except as provided in paragraph (4), the Armed Forces of the United States shall hold a person described in paragraph (2) who is captured in the course of hostilities authorized by the Authorization for Use of Military Force (Public Law 107-40) in military custody pending disposition under the law of war.
(2) COVERED PERSONS- The requirement in paragraph (1) shall apply to any person whose detention is authorized under section 1031 who is determined--
(A) to be a member of, or part of, al-Qaeda or an associated force that acts in coordination with or pursuant to the direction of al-Qaeda; and
(B) to have participated in the course of planning or carrying out an attack or attempted attack against the United States or its coalition partners.
(1) UNITED STATES CITIZENS- The requirement to detain a person in military custody under this section does not extend to citizens of the United States.
(2) LAWFUL RESIDENT ALIENS- The requirement to detain a person in military custody under this section does not extend to a lawful resident alien of the United States on the basis of conduct taking place within the United States, except to the extent permitted by the Constitution of the United States.
Sounds pretty straightforward that this will require the military to detain any person except for US citizens and possibly resident aliens. However, it seems possible that they could be detained by civil authorities instead.
Here's an interesting part in Section 1031.
(a) In General- Congress affirms that the authority of the President to use all necessary and appropriate force pursuant to the Authorization for Use of Military Force (Public Law 107-40) includes the authority for the Armed Forces of the United States to detain covered persons (as defined in subsection (b)) pending disposition under the law of war.
(b) Covered Persons- A covered person under this section is any person as follows:
(1) A person who planned, authorized, committed, or aided the terrorist attacks that occurred on September 11, 2001, or harbored those responsible for those attacks.
(2) A person who was a part of or substantially supported al-Qaeda, the Taliban, or associated forces that are engaged in hostilities against the United States or its coalition partners, including any person who has committed a belligerent act or has directly supported such hostilities in aid of such enemy forces.
This language doesn't mention any exceptions and could possibly include US citizens. Regardless, indefinite detention is an abomination. It's something that would red line our anger meter if another country decided to do the same for our citizens.
I can't wait to see how the never ending war turns out.