It's a crucial test for General Motors CEO Mary Barra, as she heads to Washington to answer questions about the recall of 2.6 million vehicles. She's tried to turn this public relations nightmare around, but will it be enough? Barra's and GM's reputations are both on the line.

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This video series features interviews with big thinkers—including economists, strategists, financial advisors and portfolio managers—on the economy, markets and investor-related topics.