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In his first network interview, new Homeland Security Secretary Jeh Johnson discusses the latest security threats and the debate over immigration policy, only on "This Week" Sunday.

Plus, George Stephanopoulos goes one-on-one with Sen. Elizabeth Warren, D-Mass., on her new book "A Fighting Chance."

And the powerhouse roundtable debates all the week's politics, with ABC News political analyst Matthew Dowd, ABC News contributor and Weekly Standard editor Bill Kristol, Nobel Prize-winning economist and New York Times columnist Paul Krugman, and Fusion's "AM Tonight" host Alicia Menendez.

And in our "Sunday Spotlight," GMA anchor Robin Roberts discusses her new book, "Everybody's Got Something" and her historic 2012 interview with President Obama on same-sex marriage.

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

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