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Fissionable materials can be detected from copters and planes.
Executive Order No. 9701 of March 4, 1946, (1) entitled "Providing for the Reservation of Rights to Fissionable Materials in Lands Owned by the United States", is hereby revoked; but such revocation shall not be construed to affect the revocation of Executive Order No. 9613 (2) made by Executive Order No. 9701 or the provisions contained therein with respect to the lands released from withdrawal by the revocation of Executive Order No. 9613.