NASA astronaut Mark Vande Hei, left, and his wife Julie visit the Space Shuttle Columbia memorial, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)
NASA astronaut Mark Vande Hei, left, and his wife Julie visit the Space Shuttle Columbia memorial, Friday, June 15, 2018 at Arlington National Cemetery in Arlington, Va. Photo Credit: (NASA/Aubrey Gemignani)