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What's the first thing General Petraeus changed when he got to the CIA?

| General David Petraeus talks about how he transitioned from the military and his post leading troops in Iraq to director of America's spy agency, the CIA. For more, watch "48 Hours Presents: The Spymasters - CIA in the Crosshairs" Saturday, May 21, 9 p.m. ET/PT on CBS. | Complete coverage