Support WBUR3 Astronauts Walk Into NPR ...Laura WagnerSeptember 15, 2015 ShareEllen Stofan (from left), chief scientist of NASA, and astronauts Samantha Cristoforetti, Serena Auñón and Cady Coleman. (NPR)
Ellen Stofan (from left), chief scientist of NASA, and astronauts Samantha Cristoforetti, Serena Auñón and Cady Coleman. (NPR)