What does this have to do with the 9/11 criminals or their actions? Our military power is spread around the world because we were asked to do so...exception being post WW II occupations. However, if we are asked to leave by the host country, we leave. The American tax payer including me, would like to see less military bases overseas.
You're the global mafia now. Its the dictators and autocrats you support that want to keep you around.
Its not your job to decide who elects what government. Or arm the extremists. Like arming the anti-government Sunni extremists in Iraq.