The US Department of Justice [official website] on Friday filed an appeal of this week's order by the US District Court for the Southern District of New York [official website] that permanently enjoined [opinion, PDF; JURIST report] a law allowing US authorities to detain indefinitely anyone suspected of having aided known terrorist organizations. Section 1021(b)(2) of the National Defense Authorization Act (NDAA) [text, PDF] affirms the authority of the president under the Authorization for Use of Military Force (AUMF) to detain indefinitely any "person who was a part of or substantially supported al Qaeda, the Taliban, or associated forces...