According to Boeing, the U.S. Air Force tested an oxygen-iodine laser with a 15km range in the New Mexico desert, calling the trial run a success.
USA Today says that the Advanced Tactical Laser was carried aboard a C-130 plane. Though the power level produced during the test wasn't revealed, these lasers, Global Security says the Advanced Tactical Laser can produce between 100-300 kW of lethal or non-lethal power (in theory).
The Advanced Tactical Laser is said to improve accuracy of military attacks with less collateral damage, something the U.S. Military has drawn criticism for as of late. But you know that secretly, General Gates is even more excited by the idea of getting some pew pew action in real life. [USA Today]