We buy nearly half our fireworks from other countries. As for Old Glory, we import most of our flags from China. In fact, the number of imported flags that don't come from China -- about $400,000 worth -- is roughly the same as the number of flags we export to other countries.
Independence day, you see, requires a pinch of co-dependence. More dubiously (er, progressively!) patriotic factoids in our homemade infographic below.