Hosted by Jane Pauley. In our cover story, David Pogue explains what our nation's debt ceiling is, and why the fight over raising it threatens global recession. Also: Tracy Smith sits down with actor and climate activist Arnold Schwarzenegger; David Martin reports on the removal of the names of Confederate generals from U.S. Army bases; Rita Braver interviews novelist Isabel Allende; Ted Koppel joins New Orleans jazz clarinetist Doreen Ketchens at a particularly auspicious gig.

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