If its metal and it isn't tied down (or tied down loosely) the Chinese will buy it - for scrap.  Aluminum cans bring a penny, the steel bed frame will get maybe two bucks, the computer case...Who needs a nuke or an invading army?   Just export a lot of stuff via Walmart and your national metals futures markets will pay enough to cause the dismantling of your customers infrastructure from the inside.

American democracy is a beautiful thing.  We all have a chance to work for our health care!