For a related item, look up Magnequench. They were bought out by the ChiComs and moved to the PRC back in the 2003-4 timeframe. Turns out they are the sole source of rare earth magnets suitable for our cruise missile guidance systems. If China says “No”, we will have a helluva time making cruise missiles that fly straight. I did not think that “Free Trade (TM)” was a suicide pact. If the right palms are greased, anything is possible, I suppose.
That wasn’t a “free trade” issue, but nice try.
Magnequench: CFIUS and China's Thirst for U.S. Defense Technology
[Heritage Foundation via FreeRepublic].