The Constitution gives the President authority (and the RESPONSIBILITY) to use military force, deploying military troops for 30 days before he needs to even notify Congress that he has done so, and another 180 days before he is required to ask permission to continue. If denied, he has another 180 days to remove troops, giving him the authorization to conduct military operations consistent with war for up to a year without having approval from Congress. In this case, Congress very quickly gave a very broad sweeping approval that has never changed (incidentally, it still provides President Obama more than enough latitude to conduct operations currently under way even though, to date, he is also within his Constitutional authority without the Authorization of Force- and the GOP and Faux News still like claiming he is waging an unConstitutional war). There was no Nation-State against which a legal Declaration of War could be made with regard to terrorism, so the Authorization of Force is the closest thing upon which we have relied. Unfortunately, the nature of terrorism and the tactics if terrorist organizations changes monthly (almost on pace with technological advances) so any Authorization of Force older than 8 months is antiquated. It is time to phase this one out, write a law that requires a new one every 8-12 months, and streamlines the process without losing checks and balances or giving the Tea Party morons another means of government shutdown.