We are 100% dependant on parts that only Asian countries have the know-how to assemble.
AFAIK, it's not a question of "know-how," really -- it has more to do with (a) labor costs, and (b) "exporting" high-pollution manufacturing processes abroad.

In fact, (b) is especially important, because making computer components is VERY FAR from "Green". (For the same reason, we eco-conscious Westerners buy compact-fluorescent bulbs and LED bulbs that are made in China -- these technologies may save a lot of electricity here, but they're quite "dirty" to manufacture. However, it has nothing to do with lacking "know how" to produce these items in our own countries.)