Giant Mirrors Could Light Up the Skies
In the hope of building a worldwide network of laser weapons, the United States Defense Department appears to be pondering a fleet of mirror-toting blimps. Defense Tech reports that the Office of Force Transformation, which spends its days dreaming up bizarre new ways to spend all of the country's money, has spent a few years planning this mirror network, which it calls the Tactical Relay Mirror System. At present, there is no known laser efficient enough to support such a global optical weapons system, but at least the blimps will give satellite spotters something new to look at.
Quoted from: http://blog.wired.com/gadgets/