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As political turmoil and violence engulfs Ukraine, we cover the latest on the crisis and the U.S. response, Sunday on "This Week."

Plus, ABC News' Martha Raddatz speaks exclusively with former President George W. Bush and decorated Marine Corps veteran and Team Rubicon co-founder Jacob Wood on the Bush Institute's Military Service Initiative aiding veterans returning from war.

And the powerhouse roundtable debates the escalating crises overseas and all the week's politics, with Democratic strategist and ABC News contributor Donna Brazile, ABC News political analyst Matthew Dowd, New York Times foreign affairs columnist Tom Friedman, and Weekly Standard editor and ABC News contributor William Kristol.

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

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