Paris Airshow 2019
Former National Aeronautics and Space Administration astronauts Retired U.S. Marine Corps Col. Walt Cunningham, left, Retired U.S. Air Force Brig. Gen. Charlie Duke, center, and Retired U.S. Air Force Col. Al Worden, right, are applauded during an opening ceremony at the Paris Air Show, June 17, 2019. The summer of 2019 marks the 50th anniversary of man's first steps on the moon, and the occasion of this year's air show creates a unique opportunity to celebrate the achievements of the Apollo program. (U.S. Air Force photo by Master Sgt. Eric Burks)

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Photo by: Master Sgt. Eric Burks |  VIRIN: 190617-F-XJ860-0022.JPG