WASHINGTON, Aug. 11 -- Ferroglobe USA, Inc. submitted a public comment letter to the U.S. Department of Commerce regarding the Section 232 national security investigation of imports of polysilicon and its derivatives. The company expresses strong support for the investigation aimed at determining the need for Section 232 duties to protect the domestic polysilicon industry. Ferroglobe emphasizes that no matter the outcome of the investigation, the current UFLPA should be broadened to encompass a more ST