15197 EXTRACTED VERSION HEADQUARTERS JOINT TASK FORCE SEVEN Operation Order No. 1-53 20 June 1953 Pacific Proving Grounds NOTICE This is an extract of Operation Order No. 1-53, which remains classified SECRET/RESTRICTED DATAasof this date. Extract version prepared for: Director DEFENSE NUCLEAR AGENCY Washington, D.C. 20305 1 January 1981 Approved for public release; distribution unlimited.