Franklin Roosevelt actually said...
Possession of the mines, collieries, and facilities taken under this order shall be terminated by the Secretary of the Interior within sixty days after he determines that the productive efficiency of the mines, collieries, and facilities has been restored to that prevailing prior to the interruption of production referred to in the recitals of this order.
Context
Executive Order 9481—Authorizing the Secretary of the Interior to Take Possession of and Operate Certain Mines, Collieries,...
09/11/1944