Mario Woods nuclear-base 'pulsating glow' account.
allegedclose_encounterConjecture Layer (hypotheses)
A single-witness account (Jesse Michels interview) by a 1977 nuclear-missile-base security officer of a pulsating orange/white glow resolving to a featureless 'boiling-Sun' sphere over a silo, a blinding downward light, and 'the air vacated'.
Single-witness, ~48 years after the fact, no physical evidence - tier alleged. Notable for an unusually specific and physically-constrained description (featureless silent sphere, no exhaust), which makes it a useful anchor for a propulsion-feasibility exercise even though the event itself is unverified.