President Donald Trump has imposed tariffs on copper imports valued at more than $15 billion, marking the first wave of such measures. These tariffs are expected to create inflationary pressures on American manufacturers who rely on copper. The move comes amid concerns over the U.S. defense industry's dependence on rare earth minerals controlled by China, which supplies critical components for weapons systems including missile magnets, infrared sensors, and drone motors. Industry leaders like Lockheed Martin have warned of shortages and potential delays. White House Trade Adviser Peter Navarro highlighted that the U.S. lacks sufficient refining capacity for copper, a vulnerability exposed by China's control over rare earth exports. The tariffs have caused disruption in global markets and raised questions about their broader economic impact.