Waseca, Minnesota CNN —  

John David LaDue cradled the homemade bomb in a tree not far from school. It was summer 2013, and classes were out – the perfect time to test his explosive.

He lit the fuse.

Nothing.

The teen had used hot glue for his sealing agent. He switched to auto body filler.

The next time, his bomb exploded.

And the next time, too.

The rush grew addic