The largest weapons manufacturer in the world is focusing more of its massive wealth and resources on addressing energy sustainability issues. As the top defence contractor in the United States, Lockheed Martin has pocketed billions of U.S. taxpayer dollars developing and manufacturing nuclear-capable Intercontinental Ballistic Missiles, depleted uranium weapons systems, unmanned aerial drones, fighter jets, stealth bombers and literally hundreds of other forms of military weaponry and logistical support systems. In short, Lockheed Martin has achieved its place on Forbes’ Fortune 500 list by being in the business of war; or, more precisely, the business of death. So does the company’s growing interest in energy sustainability represent a desire to shift away from producing killing machines and towards protecting all life on the planet? Is it merely an attempt to create a positive environmental image? Or does it constitute a greening of warfare?