This is going to offend and disgust you all, but it needs to, and it’s undeniably centered around amateur radio. Please read ‘Frequently Proposed Stupidity’ before responding, because the knee-jerk reaction enthusiasts will dismiss this, even when I’m confronting their asinine, antiquated world views, head on:
Wait until he finds out what can be done with a magnetron and a momentary switch.
note: that’s a very incomplete description but I’m not going to just tell you how to build an emp device. If you can’t do it yourself you’re not responsible enough to have one.