The loss of Palmyra represents one of the biggest setbacks for the ultra-hardline Islamist group since it declared a caliphate in 2014.
Syrian government forces recaptured Palmyra on Sunday, state media and a monitoring group said, inflicting a significant defeat on Islamic State.
Three new terror suspects were charged in Brussels, prosecutors said, amid widening fears about new attacks.
In addition to the death of Haji Imam this month, the Pentagon confirmed the killing of another top leader. NBC News reports.
Two Americans were killed in Tuesday's suicide bombings in Brussels, a senior U.S. official said on Friday.
France's interior minister said a Frenchman has been arrested in the "advanced stages" of a plot to attack that country.
While it's impossible to value safety, how much would it cost to expand U.S. airport security to the level of other countries — and who would pay for it?
CNBC's Michelle Caruso-Cabrera reports the latest from Brussels where officials have lowered the terror alert by one level.
The terror attack in Belgium shook Europe to the core. How will this event impact open borders, safety abroad, and safety here? And what measures should be taken to prevent more attacks from happening? We talk to Ian Bremmer of Eurasia Group and Michael O’Hanlon from the Brookings Institution.
House of Representatives' Stephen Lynch (D-Mass.), and David Phillips of the Columbia University Institute for the Study of Human Rights, discuss how terror groups like ISIS are funding their activities.
CNBC's Michelle Caruso-Cabrera reports from Brussels about the criticism of Belgian security forces and the responses from EU politicians in the aftermath of the terror attacks on Tuesday.
European intelligence and law enforcement agencies are too fragmented to tackle terrorist threats, former U.S. Navy officer Malcolm Nance says.
U.S. Attorney General Loretta Lynch speaks about the administration's support for the victims of Tuesday's attacks in Brussels.
CNBC's Michelle Caruso-Cabrera reports from Brussels with the latest information on Tuesday's attacks including police saying that there is a definitive connection between these attacks and the attack in Paris at the Bataclan.
Activist hacker group Anonymous is calling for people to stand up against discrimination as part of its fight against Islamic State after Brussels.
The Brussels attacks represent a new terrorist strategy that will be challenging for law enforcement to tackle, former TSA official Chad Wolf says.
CNBC’s Michelle Caruso-Cabrera speaks to Belgian Liberal Party’s Olivier Alsteens, after the Brussels terror attacks, on securing public spaces.
Malcolm Nance, retired U.S. Navy Senior Chief Petty Officer in Naval Cryptology, discusses the unpredictability of an ISIS-enabled attack.
Former TSA Administrator Chad Wolf discusses “behavioral detection” at airport security, and preventing another terrorist attack.
CNBC's Eamon Javers reports from Silver Spring, Maryland, on protecting public citizens and keeping secure rail and transit systems.