So, China has put export controls on rare earths.
People think “well, we’ll just mine them ourselves” but it often isn’t that simple. Gallium is refined as part of the process of aluminum smelting, for example, and the US has no aluminum smelting industry left.
More generally speaking the world is unfolding as I predicted: it’s splitting into two trade blocs, a cold war is developing (the Syrian “uprising” is a cold war maneuver) and the US is trying cannibalize its satrapies: that’s what Trump’s tariffs on allies are about.
Since the 50s it was deliberate American policy to offshore industry to its allies, especially South Korea, Japan and Taiwan, but also to Europe and the Anglosphere to some extent. Now it wants to pull that back in. This has been especially noticeable, of late, in Germany, where heavy industry is shutting down and much of it is moving to the US.