guess what? welcome back. russian anti helicopter nano nuclear...call it "dirty bomb" it blows up when helicopters get close 200 meters, and the electricity is accumulated. Now they actually, from hundreds of the "system" studies, don't know whats's a nuclear IED design, they keep on imagining, or saying, its a real nuclear ogive transformed, or an implosion trigger for fission (?) and here it is the design , coming from Vietnam Intel .

https://vn.sputniknews.com/vietnamese.ruvr.ru/2014_05_24/272736719/