c, Somewhat greater details on the methods of measuring effects. All data on weapons manufacture and all information concerning currently deliverable weapons (1.e. the King test) has been de- It is believed that the declassification of the film will ws leted. not adversely affect the common defense and security. DOE ARCHIVES | 3. After declassification, the film will be marked "Official Use Only" for the occasion of the showing to the Conference of Mayors, | The Division of Information Services points out that the Government's reputation with the media of mass communications and the public for not withholding unclassified material from publication is likely to be impaired bycontinuing the "Official Use Only" marking on the film for any appreciable time after the Showing to the Mayors. This Division therefore feels that there should be provision for dropping of the "Official Use Only" marking after the showing to the Mayors. when an all-media release can be made, This should be done Such release should occur at the earliest possible time agreeable to the National Security Council, the FCDA, the DOD and the AEC. STAFF JUDGMENTS 4. The recommendation of this paper has the concurrence of the Divisions of Military Application, Information Services and the Office of the General Counsel, RECOMMENDATION 5. That the Atomic Energy Commission: a. Determine that the information disclosed in the deleted version of the documentary film "Operation Ivy", which was screened at Commission Meeting 939 on November 12, may be published withcut adversely affecting the common deferse and security; b. Note that no information remains in the film which would give any indication as to the nature of the thermo- nuclear reaction, about; or to the manner in which it is brought :