This week on "Sunday Morning" (December 8)

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HEADLINES: In prisoner swap, Iran and U.S. release detained student, scientist (Video)After three years in a Tehran prison, Princeton graduate student Xiyue Wang is on his way home, in exchange for Iranian scientist Masoud Soleimani, who'd been arrested in the U.S. last year – part of a prisoner swap arranged between the United States and Iran. Roxana Saberi reports. 

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