I don't live in America. And my country makes all kinds of crap. Clusterbombs and what not. The landmine was meant as an illustration, not as a particular item, it could just as well have been a clusterbomb or some other intrinsically negative item.
Sorry, that was a pretty ethnocentric assumption on my part. A case could be made that landmines are intrinsically negative as they are non-discriminating hazards that render large portions of land unsafe well after a conflict has ended. Bombs, missiles tanks etc, I am not so sure of. I would appraise them as neutral, with the potential to be negative or positive.