I have the tee shirt to prove it.

Lots of interesting cold war information there too. Most Americans don't know how many service men died collecting sigint during period from after WWII until the late 1980's

Tannerite is a common binary explosive. You can order it shipped via USP ground.

Great stuff. Only caveat is you can not store the stuff except in an approved magazine once it is mixed. The components are stable and only mildly flammable before mixing. Once mixed it is cap sensitive/high impact sensitive. Most common detonation method is high velocity impact. 5.56X45mm is just barely enough. 7.62 NATO works every time.

Explosive are not illegal. Unsafe/improper storage is a crime.

You can buy binary explosives off the internet in 50 pound lots. You just have to mix it at the point of use on private property and not store it over 24 hours.

Google for boomer shoots and tannerite. Look at the National Firearms Act of 1934 for the definition of what fun stuff is legal with the right tax payment.