The Khorasan threat raises concerns about leaving a vestige of al-Qaeda intact.
The agency director’s criticisms echo the frustrations of law enforcement officials nationwide.
FBI director would not name the Islamic State suspect who beheaded Americans and a British aid worker.
Some U.S. officials described the Khorasan group as “nearing the execution phase” of a terrorist plot but others said there was no indication of a specific plan.
After he spent years installing constraints on counterterrorism operations, the U.S. is on a significantly different course.
Agencies remain uncertain about the danger that the militant group poses to the United States.
13 years after 9/11, U.S. operations rage on against terrorist groups in Pakistan, Somalia and Yemen.
Journalist Steven Sotloff was kidnapped in 2013 and was being held by the Islamic State.
Reliable information and drones would be limited in an offensive in Syria against radical Islamist group.
Senior White House officials meeting on purported beheading of American journalist James Foley.