People visit Johnson Space Center of American National Aeronautics and Space Administration (NASA) in Houston, the United States, on October 27, 2018. The center opened to the public as part of the celebrations of NASA's 60th anniversary and also the 20th anniversary of the beginning of construction of the International Space Station. [Photo: VCG]"

People visit Johnson Space Center of American National Aeronautics and Space Administration (NASA) in Houston, the United States, on October 27, 2018. The center opened to the public as part of the celebrations of NASA's 60th anniversary and also the 20th anniversary of the beginning of construction of the International Space Station. [Photo: VCG]"

People visit Johnson Space Center of American National Aeronautics and Space Administration (NASA) in Houston, the United States, on October 27, 2018. The center opened to the public as part of the celebrations of NASA's 60th anniversary and also the 20th anniversary of the beginning of construction of the International Space Station. [Photo: VCG]"

People visit Johnson Space Center of American National Aeronautics and Space Administration (NASA) in Houston, the United States, on October 27, 2018. The center opened to the public as part of the celebrations of NASA's 60th anniversary and also the 20th anniversary of the beginning of construction of the International Space Station. [Photo: VCG]"