President Donald Trump announced on Sunday that the leader of the so-called Islamic State Abu Bakr al-Baghdadi died in an overnight U.S. military operation in Syria, delivering a major blow to the terrorist group even as American forces withdraw from the area.

But tighter security comes with a level of disruption that consumers and businesses have been loath to accept, James Rubin says.

Officials are looking for Ahmad Khan Rahami, a 28 year old male, for his suspected role in the bombings that have occurred in New York and New Jersey.

Terror attacks are spreading in part because the Islamic State’s enemies are playing defense rather than offense, Michael Leiter said.

A renewed push is on to declassify a secret chapter of the 838-page joint inquiry report issued in December 2002 by the House and Senate intelligence committees, in part because of a lawsuit seeking to hold Saudi Arabia accountable for the attacks.

Activist hacker group Anonymous is calling for people to stand up against discrimination as part of its fight against Islamic State after Brussels.

European intelligence and law enforcement agencies are too fragmented to tackle terrorist threats, former U.S. Navy officer Malcolm Nance says.

Rapidly deteriorating relations between Saudi Arabia and Iran – and, increasingly, other Middle Eastern nations – will damage peace talks in Syria and will only serve to benefit Islamic State (ISIS)

Jane Wells reports on the new developments out of San Bernardino, where the FBI said the assailants in the deadly attacks had been radicalized for a long time.

The technology proficiency of terrorist organizations is on a swift rise. As governments continue to unravel the planning behind the Paris attacks, groups such as the Islamic State and Boko Haram are using consumer technology products and social media to communicate and propagandize. “The Islamic State uses a wide variety of communication technologies, just as …

Michelle Caruso-Cabrera reports on the latest terror crisis.

Now that Anonymous has declared cyberwar against the so-called Islamic State in retaliation for the Paris terrorist attacks, the question becomes: What can the hacker group actually do? Taking over and shutting down Twitter accounts is a logical first step. But the real prize, experts say, is in fundamentally disrupting the militant group’s recruiting mechanism. …

Michelle Caruso-Cabrera reports from Paris where the manhunt is still underway for suspects who carried out Friday’s attack.

In light of the attack on the satirical magazine Charlie Hebdo in Paris and the cyber-attack against Sony Pictures, what should be done in the face of intimidation?

The United States military is studying digital currencies like bitcoin to learn if they can be traced and to figure out how they are used by America’s adversaries around the world. CNBC has learned that the global policy counsel of the Bitcoin Foundation flew to Florida to meet with officials from U.S. Special Operations Command for a …