THIS IS THE TWENTY SECOND EDITION OF THE USAF STATISTICAL DIGEST. IN ADDITION TO THE USUAL STATISTICAL SUMMARIES, MATERIAL REFLECTING USAF ACTIVITIES IN SOUTHEAST ASIA (SEA) HAVE BEEN INCLUDED AND MAY BE FOUND AT THE END OF VARIOUS SECTIONS. PART I, AIR FORCE UNITS AND CAPABILITIES, INCLUDES DATA ON USAF AIRCRAFT POSSESSED AND COMBAT READY, AIRCREWS FORMED AND COMBAT READY, AND SQUADRONS LOCATED IN SEA DURING FY 1967. PART II, FLIGHT OPERATIONS, CONTAINS INFORMATION ON AVERAGE NUMBER OF AIRCRAFT, COMBAT AND COMBAT SUPPORT FLYING HOURS AND UTILIZATION RATES AS WELL AS THE NUMBER OF SORTIES FOR EACH OPERATIONAL AND SUPPORT BASE IN SEA FOR FY 1967. DATA ON AIRCRAFT, INDICATING COMMAND OF POSSESSION, IS ALSO SHOWN. PART III, SAFETY, INCLUDES DATA ON MAJOR AND MINOR AIRCRAFT FLIGHT ACCIDENTS IN SEA FOR FY 1967 AND FY 1966. DUE TO A CHANGE IN THE ACCIDENT REPORTING DIRECTIVE, TABLES ON NON-FLIGHT ACCIDENTS HAVE BEEN DELETED (REFERENCE TABLES 16 AND 17 IN THE FY 1966 ISSUE OF THIS PUBLICATION). PART IV, MATERIEL, INCLUDES DATA ON AIR FORCE ORDNANCE EXPENDITURES IN SEA FROM FY 1965 THROUGH FY 1967. THE PRESENTATION OF USAF INVENTORY OF AMMUNITION ITEMS (REFERENCE TABLE 60 IN THE FY 1966 ISSUE) HAS BEEN REVISED TO INCLUDE MORE MEANINGFUL STATISTICS. PART VII, MILITARY ASSISTANCE PROGRAM, CONTAINS SPECIAL TABLES ON MILITARY ASSISTANCE SERVICE FUNDED PROGRAM AND FREE WORLD MILITARY ASSISTANCE FORCES IN SEA. PART VIII, MILITARY PERSONNEL, REFLECTS DATA ON MILITARY STRENGTH BY TYPE OF PERSONNEL IN SEA, AS WELL AS USAF OFFICERS AND AIRMAN CASUALTY INFORMATION DURING FY 1967. INCLUDED ALSO IS STATISTICAL DATA ON THE DISTRIBUTION OF USAF REGULAR AND NON-REGULAR (MALE AND FEMALE) LINE AND OTHER THAN LINE COMMISSIONED OFFICERS. PART IX, CIVILIAN PERSONNEL, REFLECTS DATA ON THE EMPLOYED STRENGTH OF CIVILIAN PERSONNEL IN SEA AT END OF QUARTER FOR FY 1966 AND FY 1967. PART X, MEDICAL, CONTAINS INFORMATION PERTAINING TO ADMISSION RATES FOR MAJOR ILLNESS GROUPS IN SEA. DATA PRESENTED IN THE MILITARY TRAINING SECTION OF THE FY 1966 ISSUE HAS BEEN DELETED SINCE THE REQUIREMENT FOR THIS INFORMATION NO LONGER EXISTS. OTHER MATERIAL, SUCH AS DATA PERTAINING TO AVIATION FUEL AND OIL, FOUND IN PART IV OF THE PREVIOUS ISSUE, ARE NO LONGER AVAILABLE IN THE REPORTING SYSTEM, IN OTHER INSTANCES, SOME TABLES HAVE BEEN COMBINED OR REVISED TO IMPROVE STATISTICAL DATA PRESENTATION. THE HISTORIES OF MAJOR COMMANDS AND SEPARATE OPERATING AGENCIES WERE REVIEWED AND REVISED BY THE HISTORICAL STUDIES BRANCH OF THE USAF HISTORICAL DIVISION. THE LINEAGE OF EACH UNIT HAS BEEN DETERMINED IN ACCORDANCE WITH AFP 210-1-4. IN ADDITION, THE REVISION INCLUDES INFORMATION ON THE STATUS (MAJOR COMMAND, ETC.), OF THE VARIOUS ORGANIZATIONS. THE FY 1967 CHRONOLOGY OF UNITED STATES AIR FORCE MAJOR EVENTS WAS PREPARED BY THE USAF HISTORICAL DIVISION LIAISON OFFICE (AFCHO) FROM INFORMATION SUBMITTED BY THE MAJOR AIR COMMANDS AND SEPARATE OPERATING AGENCIES AND FROM SOURCES AVAILABLE IN AFCHO. LEADERS OF THE USAF, WAS REVISED TO INCLUDE ONLY THOSE HOLDING OFFICE DURING THE CURRENT FISCAL YEAR. IT CONTAINS THE NAMES AND TENURE OF THE SECRETARY OF DEFENSE AND EXECUTIVES AND COMMANDERS OF THE UNITED STATES AIR FORCE DURING FY 1967. SOURCES FOR THE DATA CONTAINED HEREIN ARE THE PUBLISHED AND UNPUBLISHED RECORDS OF THE DATA SERVICES CENTER, EXCEPT WHERE OTHERWISE NOTED IN THE SOURCE INDICATED AT THE END OF EACH TABLE.