Michael Rosenthal, right, chief operating officer of Las Vegas-based company MP Materials, insp …

Michael Rosenthal, right, chief operating officer of Las Vegas-based company MP Materials, insp ...

Michael Rosenthal, right, chief operating officer of Las Vegas-based company MP Materials, inspects the operation at Mountain Pass Rare Earth Facility on Thursday, April 29, 2021, in Mountain Pass, Calif. (Benjamin Hager/Las Vegas Review-Journal) @benjaminhphoto