James Litinsky, MP Materials chairman and CEO, joins CNBC's 'Squawk on the Street' to discuss the company's deal with the Defense Department, in which the Pentagon will become the largest shareholder in the rare earth miner.

Lynas Rare Earths (OTCPK:LYSDY) (OTCPK:LYSCF), the largest rare earths producer outside China, soared as much as 20% to its highest level since mid-August 2022, on track for its best trading day since April 2020 after MP Materials' (MP) deal with the U.