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  • USAF via The Black Vault· 88 pages· 22 pages mention it
    • p. 47 …Testing on Echo Flight, because of it's relationship to this section will be included in this section. (U) ## MISSILE…
    • p. 50 …144 MISSILE INCIDENTS-Echo Flight Testing (EMP) The direct relationship of EMP testing and Echo Flight Incident are intermixed, these…
  • Central Intelligence Agency· 1952-10-01· 8 pages

    …LUMINOUS DISK OR BALL SEEN OVER MOULAY BOUSSELHAM -- Rabat, L'Echo du Maroc, 5 Aug 52 On 2…

  • FAA via National Archives / The Black Vault· 24 pages· 1 page mentions it
    • p. 10 …Tamefuji echos P. Beckner Large echos, okay. Was it ah, what ... I understand you have color radar in ... in the…
  • The National Archives· 22 pages· 2 pages mention it
    • p. 9 …being a circular shining disc moving on a regular flight path. It was only after observation had been kept for…
    • p. 15 …However, during the war staff at coastal radar stations had linked ‘angels’ on their screens with flights of seabirds spot…
  • Central Intelligence Agency· 1952-11-24· 4 pages

    …LUMINOUS DISK OR BALL SEEN OVER MOULAY BOUSSELHAM -- Rabat, L'Echo du Maroc, 5 Aug 52 On 2…

  • FAA via National Archives / The Black Vault· 41 pages· 3 pages mention it
    • p. 4 …A red-colored echo indica tes an especia ll y strong radar echo and a green color shows the weakest…
    • p. 35 …The flight engineer described this airbotne radar target as "not a dot, but stream-like." And his description is confirmed…

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