FDR: “It is of primary importance that this work should be done very carefully and under the supervision of an impartial…”

I would say the United Nations.

It may be in another week or ten days.

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.

All Federal agencies are directed to cooperate with the Secretary of the Interior to the fullest extent possible.