How to Build the Ultimate Naval Defence: Uber-Powerful Lasers

The US Navy wants to put powerful lasers on its ships to shoot down artillery shells and even cruise missiles at the speed of light (and really, who wouldn’t). But there are a few scientific details to sort out before sailors can deploy the beams. First we want to make sure the physics is right before throwing buckets of salt water over the thing, says Ed Pogue — via redwolf.newsvine.com