I originally submitted this link - http://www.techeblog.com/index.php/tech-gadget/us-air-force-develops-real-life-lightsaber-that-lets-soldiers-slice-through-st

I originally submitted this link - http://www.techeblog.com/index.php/tech-gadget/us-air-force-develops-real-life-lightsaber-that-lets-soldiers-slice-through-steel-doors-in-seconds http://www.techeblog.com/index.php/tech-gadget/us-air-force-... - before I noticed that the Daily Mail was the original source. It's a pity HN doesn't support multiple URLs for the same story.