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In a "This Week" Sunday exclusive, George Stephanopoulos goes one-on-one with National Security Agency Director Gen. Keith Alexander on the NSA's surveillance programs.

How critical have the NSA's phone and internet surveillance programs been in thwarting potential terrorist plots against the U.S. since Sept. 11? Has the surveillance gone too far, threatening the privacy of innocent Americans? And what damage has been done to U.S. intelligence-gathering by ongoing leaks about the NSA's programs?

Gen. Keith Alexander answers those questions and more in his first Sunday morning television interview as NSA Director, only on "This Week" Sunday.

Plus, the "This Week" foreign policy roundtable debates the latest on the NSA surveillance programs and the conflicts in Syria and Afghanistan, with ABC News Chief Global Affairs Correspondent Martha Raddatz, Council on Foreign Relations president Richard Haass, and co-founder of the Foreign Policy Initiative Dan Senor.

And the powerhouse roundtable debates all the week's politics, including the battle over immigration reform and the state of the economy, with Rep. Joaqu í n Castro, D-Texas; Rep. Mike Kelly, R-Penn., ABC News Chief Business and Economics Correspondent Rebecca Jarvis; former Lead Auto Adviser and Counselor to the Treasury Secretary Steven Rattner, now chair of Willett Advisors; and Amity Shlaes, director of The 4% Growth Project at The George W. Bush Institute.

Plus, in our Sunday Spotlight, Rep. Tulsi Gabbard, D-Hawaii, the youngest woman in Congress and an Iraq War veteran, discusses the role of women in combat.

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

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