When business is carried out in partnership with the U.S. military, it sure is. You don't think the U.S. has a military presence all over the globe to keep those countries from invading us, do you?
Real answer - the US has a military all over in order to prevent WWIII.
That was the national strategy agreed on after the Korean war started in 1950. Prior to that the US was disarming as fast as possible and reducing commitments post WWII.
The Korean war showed this was a dangerous thing to do.