Bill Greenwalt, visiting fellow, American Enterprise Institute

President Barack Obama is going to name a replacement for outgoing Defense Secretary Chuck Hagel. The White House expects to formally nominate former Deputy Defense Secretary Ash Carter to lead the Pentagon later this week. Bill Greenwalt is a visiting fellow at the Marilyn Ware Center for Security Studies at the American Enterprise Institute. On In Depth with Francis Rose, he shared insight on the challenges Carter will have to address if Congress confirms him.

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