New White House Chief of Staff Denis McDonough (left), at Friday's announcement. Behind the president: outgoing Chief of Staff Jacob "Jack" Lew, who has been nominated to be Treasury secretary.
Jewel Samad /AFP/Getty Images
January 25, 2013 Top aide Denis McDonough is moving into the chief of staff's office. Justice Department official Lisa Monaco is taking on the counterterrorism post.
March 10, 2011 Lisa O. Monaco is now principal associate deputy attorney general. She has previously served as chief of staff to the FBI director.
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