We're thinking narrowly about what 3d printing could make available to a terrorist. Firearms come to mind since there's both a lot of hubbub around the subject

We're thinking narrowly about what 3d printing could make available to a terrorist. Firearms come to mind since there's both a lot of hubbub around the subject and it's the most immediately effective way to harm someone. But surely there is a range of things a terrorist could print that we couldn't even begin to conceive of right now, things that would enable terrorism to be carried out more efficiently, covertly, or what have you. But then again, those same things could probably be constructed out of analogous parts from a hardware store anyways, similar to how anyone with access to a machine shop could fabricate their own firearms - so maybe it's not as dire an issue as it sounds.