If you've ever wondered how many American military bases exist around the world, and why, David Vine has some answers for you.
He calls his book Base Nation: How U.S. Military Bases Abroad Harm America and the World an exposé of the vast network of American bases.
His thesis: that the bases do more harm than good, annoying many societies around the world and providing launching points for military adventures far from home.
The author joins us with details of his research.