He hasn't even flown it yet. It's just sitting in his garage I'm sure. He's a hobbyist with pulse jets, I don't know much about his flight experience. He hasn't updated the website, and it has taken him years to develop ...even when one takes into account the simplicity. Fact is, it takes too long to make, they don't have the capacity to do the damage, and they cannot test or develop the weapon effectively without being caught. There is no factory making these things, but there is one making Katusha missiles and RPG's, which are unguided and ready to go; possibly more clear on how to replicate. One reason our missiles are so effective is we have hundreds of engineers working tens of thousands of hours with numerous tests that will produce a devastating weapon. Otherwise, it's just easier to make a lot of explosives and eventually hit your target. I haven't seen this topic continue to be an issue on the news, nor did it become a popular topic. I'm not terrible concerned, just aware. If the terrorists want a guidance system, they already have one which comes cheap... their people, and they seem quite willing to use them in more conventional weaponry.