Dr. Jonathan Lunine, Director, Cornell Center for Astrophysics and Planetary Science, Co-Chair of the Former Committee on Human Spaceflight, National Academies of Sciences, Engineering, and Medicine testifies during the House Subcommittee on Space and Aeronautics hearing titled "Keeping our sights on Mars: A Review of NASA's Deep Space Exploration Programs and Lunar Proposal", Wednesday, May 8, 2019 at the Rayburn House Office Building in Washington. Photo Credit: (NASA/Bill Ingalls)