NASA Inspector General Paul Martin is seen during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Inspector General Paul Martin testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Associate Administrator for the Human Exploration and Operations Mission Directorate William Gerstenmaier testifies during a Senate Subcommittee on Space, Science, and Competitiveness hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Joel Kowsky)

Sen. Ted Cruz, R-Texas, chairman of the Senate Subcommittee on Space, Science, and Competitiveness speaks during a hearing titled "Examining the Future of the International Space Station: Administration Perspectives," Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Joel Kowsky)

Sen. Bill Nelson, D-Fla., ranking member of the Senate Subcommittee on Space, Science, and Competitiveness speaks during a hearing titled "Examining the Future of the International Space Station: Administration Perspectives" held on Wednesday, May 16, 2018 in the Russell Senate Office Building on Capitol Hill in Washington. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine testifies during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine testifies during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine testifies during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine's shoes are seen while testifying during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine testifies during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine gestures with a bottle of water while testifying during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine testifies during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine testifies during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine testifies during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, right, speaks with Chairman Ted Cruz, R-Texas after testifying at a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Senator Ed Markey, D-Mass, asks NASA Administrator Jim Bridenstine a question during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, speaks with Senator Ed Markey, D-Mass, before testifying at a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Senator Bill Nelson, D-Fla, asks NASA Administrator Jim Bridenstine a question during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Chairman Ted Cruz, R-Texas, asks NASA Administrator Jim Bridenstine a question during a Subcommittee on Space, Science, and Competitiveness hearing titled, "Global Space Race: Ensuring the United States Remains the Leader in Space," Wednesday, September 26, 2018 at the Russell Senate Office Building in Washington. Photo Credit: (NASA/Aubrey Gemignani)