Oh for god's sake, almost any garage or gardener's shed contains materials that "could be used in bombs". And every kitchen has objects that "could be used" for murder or assault, every typewriter in the world "could be used" for slander or libel, and every male on the planet has body parts that "could be used" for rape. Bet you almost anything there's more rapes each year in any single large city in any of the Western nations, than there are major acts of terrorism in that entire nation.