Rick Perry's hunting camp once bore a racially charged name, Obamacare heads to the Supreme Court, and Jerome Groopman discusses medical decision-making.

Rick Davis weighs in on Chris Christie fever, ESPN pulls Hank Williams Jr.'s song, and John Lithgow talks drama.

Herman Cain gives his take on homosexuality, Mexico City proposes two-year marriage licenses, and Black Star performs.

Sarah Palin bows out of the presidential race, Stephen apologizes to Karl Rove, and Lieutenant Colonel Jason Amerine discusses the early days of the Afghanistan War.

The Occupy Wall Street movement goes global, Stephen unveils Colbert Super PAC's NBA lockout ad, and Harry Belafonte talks political activism.

Herman Cain may or may not be joking about an electrified border fence, schools take potatoes off their menus, and Steven Pinker discusses the decline of human violence.

Herman Cain blames the unemployed, Republican candidates want to end EPA regulations, and Ali Soufan provides an inside look at the war on terror.

Libyan rebels kill Muammar al-Gaddafi, Tea Party Nation demands a hiring freeze from its members, and Coldplay perform from "Mylo Xyloto."

Stephen unveils Colbert Super PAC's message, Frank Luntz conducts a focus group, and GOP presidential candidate Jon Huntsman talks about fixing America.

Herman Cain's campaign ad gets buzz, Ben & Jerry's endorses Occupy Wall Street, and Susan Saladoff explores the myth of frivolous lawsuits.

PETA files a lawsuit to free captive whales, immigrant farm workers flee Alabama, and Taylor Branch discusses the multi-billion dollar college sports industry.

Occupy Wall Street wears out its welcome, Stephen unveils his second NBA lockout Super PAC ad, and Toby Keith performs.

Stephen joins Occupy Wall Street, Wisconsin allows concealed weapons in its Capitol, and Neil MacGregor tells the history of the world with 100 objects.

Herman Cain's sexual harassment controversy unfolds; Stephen returns to Wall Street; and Yo-Yo Ma, Stuart Duncan, Edgar Meyer and Chris Thile perform.

Herman Cain discusses the Chinese nuclear threat, the government releases information on Muffingate, and Michael Pollan talks food.

Hans Beinholtz hawks Europe to investors, Colbert Super PAC adopts Herman Cain's fundraising strategy, and Nathan Wolfe examines viral pandemics.

Make Us Great Again airs its Rick Perry ad, Colbert Super PAC takes on issue advocacy, and Niall Ferguson discusses the end of western dominance.

Herman Cain holds a press conference to address sexual harassment charges, Stephen saves Christmas, and Seth Meyers talks "Saturday Night Live."

Herman Cain blames Democrats for his troubles, Michigan Senate Republicans amend an anti-bullying bill, and Father James Martin explores the role of comedy in religion.

Barack Obama plans to station U.S. troops in Australia, Rick Perry bungles another debate, and Brian Eno sings a cappella with Michael Stipe and Stephen.

Michele Bachmann gets an e-mail snub, Bill McKibben opposes construction of the Keystone XL pipeline, and Thomas Thwaites talks toasters.

The NYPD dismantles Occupy Wall Street, investors accuse Goldline International of theft, and Elijah Wood talks Middle-earth and penguins.

Newt Gingrich defends his Greek cruise, Ron Paul supporters publish a pin-up calendar, and Chris Matthews discusses John F. Kennedy's elusive heroism.

People Magazine picks its sexiest man, the congressional super committee eyes veterans' healthcare benefits, and Susan Orlean discusses the life of Rin Tin Tin.

Barack Obama omits God from his online Thanksgiving address, CNN lays off staffers in favor of user-generated content, and Siddhartha Mukherjee researches cancer.