Fox News: US Navy ready to deploy laser system this summer; rail guns aren't far behind There are problems with the laser and rail guns systems. Lasers lose effectiveness if there is rain, fog, dust or turbulence in the air. Rail guns, which fire projectiles long distances at six to seven times the speed of sound, require huge electrical supplies. The Navy says it has found a way to deal with both. What do you think? Are we getting too fancy for our own good? Or is this technology a good way to fight the wars of the future?