AFP/Getty Images

As a new terror threat closes American embassies overseas, we get the latest on this breaking story with America's highest ranking military officer, Chairman of the Joint Chiefs of Staff Gen. Martin Dempsey, plus House Intelligence Committee Ranking Member Rep. Dutch Ruppersberger, D-Md., and Rep. Peter King, R-N.Y. And Guardian columnist Glenn Greenwald brings his latest reporting on fallout over the NSA's surveillance programs and Edward Snowden's asylum in Russia.

Plus, the powerhouse roundtable debates all the week's politics, with ABC News' George Will, ABC News Political Analyst and Special Correspondent Matthew Dowd, ABC News Senior Washington Correspondent Jeff Zeleny, Starfish Media Group CEO Soledad O'Brien, Center for American Progress President Neera Tanden, former Homeland Security Secretary Michael Chertoff, now chair of The Chertoff Group, and Bloomberg View columnist Jeffrey Goldberg.

And in our "Sunday Spotlight," NPR's Scott Simon talks to Martha Raddatz about his moving series of tweets chronicling his mother's death.

See the whole political picture, Sunday on "This Week."

Like "This Week" on Facebook here . You can also follow the show on Twitter here .

Go here to find out when "This Week" is on in your area.