Sen. Jeanne Shaheen, D-NH, questions NASA Administrator Jim Bridenstine during a US Senate Appropriations Subcommittee on Commerce, Justice, Science, and Related Agencies budget review hearing, Wednesday, May 1, 2019, at the Dirksen Senate Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)

Sen. Jerry Moran, R-Kan., chairman of the Subcommittee on Commerce, Justice, Science, and Related Agencies, questions NASA Administrator Jim Bridenstine during a budget review hearing, Wednesday, May 1, 2019, at the Dirksen Senate Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)