Sabrina De Sousa, shown here at her Washington home in 2012, is a former CIA officer who was convicted in absentia by an Italian court for the 2003 abduction of a terrorism suspect, cleric Abu Omar, in Milan, Italy. She was detained in Portugal and could be extradited to Italy. The Washington Post/Getty Images hide caption
Duane "Dewey" Clarridge, a CIA veteran, speaks in May 2007 during an Arkansas Committee on Foreign Relations luncheon in Little Rock, Ark. The retired spy criticized the CIA's leadership and said a lack of human intelligence had led to mistakes in Iraq, Iran and North Korea. Mike Wintroath/AP hide caption
Russia's Vladimir Putin makes a speech in 2009 after receiving an award in Dresden, Germany, where he served as a KGB officer during the Cold War. Norbert Millauer/AFP/Getty Images hide caption
The CIA says employees can be active on social media, but within its guidelines. Andy Baker/Getty Images/Ikon Images hide caption
Gen. Michael Hayden, the former head of the National Security Agency and the CIA, testifies before Congress last August. In an interview with NPR, Hayden says the intelligence agencies, not the White House, were responsible for getting it wrong when they concluded that Iraq had weapons of mass destruction prior to the U.S. invasion in 2003. Alex Wong/Getty Images hide caption
CIA Director John Brennan made this case against encryption on Monday at the Center for Strategic and International Studies in Washington, D.C. Win McNamee/Getty Images hide caption
CIA Director John Brennan listens during a news conference at CIA headquarters in Langley, Va., in December 2014. Pablo Martinez Monsivais/AP hide caption
Former Vice President Dick Cheney. Cliff Owen/AP hide caption
Central Intelligence Agency Director John Brennan takes questions after addressing the Council on Foreign Relations on March 11. The CIA has proposed deleting the email of almost all employees after they leave the agency. But some critics are saying a larger portion of the email should be preserved. Chip Somodevilla/Getty Images hide caption
A detainee is escorted in March 2002 by two Army military police at Guantanamo Bay, Cuba. The detainee was being led to the Joint Interrogation Facility to be interviewed by government investigators. Peter Muhly/AFP/Getty Images hide caption
A doctor gives a polio vaccine to a child at a health clinic in Baghdad last week. The CIA says it banned the use of vaccine programs as cover for spying last year — a practice health officials said had wide repercussions. Ahmad Al-Rubaye/AFP/Getty Images hide caption