FBI Director Robert Mueller (L) and National Counterterrorism Center Director Michael Leiter (R) testify before the Senate Homeland Security and Governmental Affairs Committee entitled 'Eight Years After 9/11: Confronting The Terrorist Threat to the Homeland' on September 30, 2009 on Capitol Hill in Washington, DC. Getty Images logo Getty Images 2 months ago

FBI Director Robert Mueller (L) and National Counterterrorism Center Director Michael Leiter (R) testify before the Senate Homeland Security and Governmental Affairs Committee entitled 'Eight Years After 9/11: Confronting The Terrorist Threat to the Homeland' on September 30, 2009 on Capitol Hill in Washington, DC.