SCU Activity Pattern Study (Hancock et al.) documents the most severe UAP/nuclear incidents 1945-1975. Malmstrom AFB, Montana, February-March 1967: UAPs hovered adjacent to security gates and missile silos. Echo Flight — 10 ICBMs simultaneously went offline due to an “externally generated signal, source unknown.” SAC expressed “grave concern” as the cause could not be identified. Salas and Klotz confirmed Oscar Flight also went offline. The unit historian was placed on record as having been TOLD TO EDIT THAT SECTION OF THE HISTORY RECORD. The only contemporary record surviving is a message from March 17, 1967 to SAC expressing “grave concern.” Minot AFB, North Dakota, October 24, 1968: UAP landed near the base and was observed for 45 minutes by security personnel. Anomalous EM effects on radio and radar throughout. Security alarms activated. Official reports state the OUTER SILO DOOR OF ONE LOCATION WAS OPENED AND THE COMBINATION LOCK OF THE INNER DOOR MOVED. 1975 Northern Tier Wave: UAP at Loring AFB (Maine) entered high-security zone within 300 YARDS of atomic weapons storage. Wurtsmith AFB (Michigan): hovered over weapons storage. Reports escalated to NORAD, Pentagon, Air Force Chief of Staff, and SAC HQ. Security Option 3 — maximum security alert — issued to ALL SAC installations across the northern border. Malmstrom November/December 1975 logged a “FADED GIANT” incident — the official term for tampering with or loss of control over a nuclear weapon.