1562: "The Helios Laser"

Interesting Things with JC #1562: "The Helios Laser" – A $4 million missile… or a beam of light. On the deck of USS Preble, the U.S. Navy flipped the cost of war with 60 kilowatts of focused energy traveling at the speed of light. For the first time, naval firepower depends on power generation, not ammunition.