Diane Sawyer

Brian Williams, Jon Stewart, and Diane Sawyer wonder what will school science projects look like now that Pluto has been demoted.

What does the demotion of Pluto really mean to Americans? Brian Williams, Stephen Colbert, Diane Sawyer, and Jon Stewart speculate.

If Pluto is not a planet, what is it? Diane Sawyer, Jon Stewart, Stephen Colbert, and Brian Williams try to explain.

Stephen Colbert, Diane Sawyer, Brian Williams, and Jon Stewart wonder just who Neil deGrasse Tyson thinks he is?