Beam weapons almost ready for battle

http://msnbc.msn.com/id/10805240/

check what it says in part two of the story...

Beason said he has a blue-sky idea of his own, which he tags "the voice from heaven." By tuning the resonance of a laser onto Earth’s ionosphere, you can create audible frequencies. Like some boom box in the sky, the laser-produced voice could bellow from above down to the target below: "Put down your weapons."