Gordon Cooper

6 declassified cases mention this

• PDF · 1965NASA-UAP-D018, Gemini 4 Experiment Debriefing, 1967
• PDF · 1965NASA-UAP-D019, Gemini 5 Technical Debriefing, Part I, 1965
• PDF · 1965NASA-UAP-D020, Gemini 5 Technical Debriefing, Part II, 1965
• AUD · 1963NASA-UAP-D010, Mercury Atlas 9 Audio Excerpt, May 15, 1963
• AUD · 1963NASA-UAP-D011, Mercury Atlas 9 Audio Excerpt, May 15, 1963
• AUD · 1962NASA-UAP-D023, Interview Excerpt with Astronaut Gordon Cooper, 1962