Former NASA astronaut, Paul Richards, speaks about his experience viewing Earth from space at NASA's Earth Day event on Thursday, April 19, 2018 at Union Station in Washington, D.C. Photo Credit: (NASA/Aubrey Gemignani)
Former NASA astronaut, Paul Richards, speaks about his experience viewing Earth from space at NASA's Earth Day event on Thursday, April 19, 2018 at Union Station in Washington, D.C. Photo Credit: (NASA/Aubrey Gemignani)