Because of his high clearance, Air Force Sergeant Bill Holden was assigned to top-secret flights and special air missions. On trip took him to the above location on a mission called Project Mercury. It consisted of Air Force officers and civilian scientists. Although ordered to remain at a distance Holden said he could see a vehicle shaped like a saucer and parked on three legs. And to his surprise he said he also saw two aliens wearing silver/gray metallic coverall uniforms. Before the mission he had to sign a 20-year non-disclosure statement and was asked if he objected to being involved in other similar projects.

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