It took the U.S. decades to respond to the 1970s energy shock with a strategic oil reserve, now it’s rerunning that playbook with rare earths

Buried in large, underground salt caverns along Texas and Louisiana’s coast, the world’s largest supply of emergency crude oil has been an invaluable resource for the U.S. For five decades, the Strategic Petroleum Reserve has helped the U.S. government conduct foreign policy and calm markets and prices at the pump in the event of supply disruption. Such is the SPR’s importance that the Trump administration is set to build another reserve of that ilk, this time to stockpile a resource some analysts...