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Phenomenon type

Classified tech, later identified

Retrospectively identified as classified US or allied technology (U-2, A-12 OXCART, SR-71, drone testing).

2 cases in the archive

  1. OTHER · 1954-08-01 · explained
    CIA U-2 and OXCART programs, UAP explanatory record

    Declassified CIA institutional history covering the U-2 (1954-onwards) and A-12 OXCART (1962-onwards) programs, including the agency's accounting of how these programs' high-altitude flights generated a substantial fract...

  2. DoD · 1948-01-07 · explained
    Mantell Incident

    Captain Thomas F. Mantell, a Kentucky Air National Guard pilot, died after his F-51 Mustang crashed during a high-altitude pursuit of an unidentified object reported by Godman Field tower personnel and civilian witnesses...