If the interest is to ensure national security, isn't better to spend the money on a better defense system in and around the US? I agree with the decision to invade and paralyze countries that intend to use nuclear or weapons of mass destruction on others, like what some countries thought Iraq had. Now that it's proven otherwise, shouldn't the US get out now and use that money to improve its own economy? I think that's what the US is doing but I guess my question is why only now?
Actually, I'm nore interested in knowing why the US stations troops in countries like South Korea, Japan, I believe Israel too, and some countries in the world. What's the point?
Sorry if my questions sound stupid, as my knowledge of history is almost next to none. I'm reading and trying to understand better and this is part of the effort.