FDR: “We must keep our eyes fixed now upon the one all-important primary task to produce more materials at a greater speed.”

I would say the United Nations.

Possession of any mine or mines taken under this order shall be terminated by the Secretary of the Interior as soon as he determines that such possession is no longer required for the successful prosecution of the war.

It is not really of any great importance.

The Secretary of the Interior shall make employment available and provide protection to all employees working at such mines.