A would-be suicide attacker in a foiled "underwear bomb" plot was an undercover agent, reports from the United States say. US officials are quoted as saying the person dispatched by a Yemen-based cell of al-Qaeda to attack a US-bound plane had infiltrated the group. In an apparent intelligence coup, the agent left Yemen with the device and delivered it to the CIA. Host Marco Werman talks with Los Angeles Times reporter Brian Bennett.

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