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NASA-UAP-D014, Mercury-Redstone 4, July 21, 1961

    Released: 5/22/26
    Incident: 7/21/61
    Location: North Atlantic Ocean
  

During the recovery of the fourth launch and second crewed spaceflight of Project Mercury, Mercury-Redstone 4 (MR-4) Liberty Bell 7, the recovery team discusses a dye pack in the water that did not activate.