Late last year, Reuters reported that the U.S. Defense Department plans to fund mining and processing operations for rare earth elements—a class of minerals for which China dominates the global market, producing over 80 percent of the world’s supply. In the past, China has restricted exports of rare earths, and recently threatened to do so again. Even with a phase one trade deal hammered out between the United States and China, natural resources are likely to remain a point of geopolitical tension.