Iraq, Libya and Afghanistan are not the only places the US has left a mess. Around the globe, where America has waged wars and set up military bases. Even on US soil the actions of the military have left a dirty and even toxic mess for local communities. As it turns out the United States Department of Defense is the biggest polluter on the planet. Though the mess may just be too expensive for the Pentagon to clean up, Derrick Crowe of the Brave New Foundation brings his take on the problem.