"Chasing Pluto": NASA probe traveled 3 billion miles in 9 years
NASA will complete a discovery mission that began more than half a century ago Tuesday. Since 1962, U.S. robotic spacecrafts and landers have visited every planet in the solar system except Pluto. Time Magazine editor-at-large Jeffrey Kluger and "Nova" deputy executive producer Julia Cort, join "CBS This Morning" to discuss the new documentary.