Sen. Mark Kelly (D-Ariz.) marked the 20th anniversary of his STS-121 mission aboard Space Shuttle Discovery, reflecting on the rare July 4, 2006, launch and calling it a proud example of U.S. space exploration and innovation.
Sen. Mark Kelly (D-Ariz.) marked the 20th anniversary of his STS-121 mission aboard Space Shuttle Discovery, reflecting on the rare July 4, 2006, launch and calling it a proud example of U.S. space exploration and innovation.