AdvertisementSecurity Team Shuffle Suggests Cautious Period AheadApril 28, 2011Alan GreenblattfacebookEmailThis three-photo combination shows CIA Director Leon Panetta (left), who will become the new U.S. secretary of defense this summer, replacing current Defense Secretary Robert Gates (center). Gen. David Petraeus (right) will replace Panetta as the head of the CIA. (AFP/Getty Images)