https://www.centerforsecuritypolicy.org/2015/09/16/a-clock-or-a-bomb-trigger/
Riiiiiight. You don’t need the guts of a Radio Shack alarm clock to make a detonator...
...and if I packed your car full of ANFO and wired a blasting cap to it, your car would be a bomb. Shall we have you arrested on that basis?
Riiiiiiiiiiiiiight. Because it's a reasonable expectation that all average citizens would know that. LOL
https://www.centerforsecuritypolicy.org/2015/09/16/a-clock-or-a-bomb-trigger/