Ok. It's no empire death star, but it still pegs the killer app badness meter at a hard eleven! If it works.
The Flying Laser Cannon: Boeing's new laser cannon can melt a hole in a tank from five miles away and 10,000 feet up—and it’s ready to fly this year.
Last December, Boeing, under contract from the Department of Defense, installed a $200-million prototype of the laser into a C-130 at Kirtland Air Force Base in New Mexico in preparation for test flights this year. From there it will go to the Air Force for more testing, and it could be in battle within five years.
In other words, How to Melt a Tank in Three Seconds Or Less.