Should the U.S withdraw from the world?

The U.S has military installations in a large number of countries that are not currently in active military situations. I have come up with a few decent reasons to have installations in other countries, but none of them are worth the amount we spend on these stations each year. There are other priorities we have to deal with which we should be spending the money on in the U.S. The U.S is stretched out enough as it is, we don't need to waste time throwing military forces all over the planet because we think it is our duty to protect EVERYONE.

I'm not saying we should withdraw all of our forces from active military zones. We have an obligation to finish what we started in military campaigns around the world, but I see no reason to have so many people stationed around the world were they are not necessarily needed. See this.

A map of military installations: