Police say the man behind ballot box fires has metalworking experience and might plan more attacks
Police say the man behind ballot box fires has metalworking experience and might plan more attacks

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Police say the man behind ballot box fires has metalworking experience and might plan more attacks

Probably just whipped up some thermite.
Not something you typically do on a whim. The process isn't exactly without risk.
50/50 Aluminum powder and rust that's stable enough to resist igniting under a blow torch. What's dangerous about making it?
It's one of the easiest high-energy reactions to prepare, contains only very stable powdered iron and aluminum (though you can add other things as buffers to slow the reaction, such as boron or carbon) and it can only be kicked off by VERY intense heat, like from burning magnesium or the burning titanium powder in a sparkler. Thermite can be shipped through the mail with no special considerations. Were you thinking of something else?
Making thermite is pretty easy actually!