Explorer 1 60th Anniversary

Michael Watkins, Director of NASA's Jet Propulsion Laboratory, left, Susan Finley, who began working at NASA's Jet Propulsion Laboratory in January 1958 as a "human computer", center, and Thomas Zurbuchen, Associate Administrator for NASA's Science Mission Directorate, right, pose for a picture with a replica of the Explorer 1 satellite during an event celebrating the 60th Anniversary of the Explorer 1 mission and the discovery of Earth's radiation belts, Wednesday, Jan.