The identity of the masked executioner clutching a knife in ISIS beheading propaganda videos was revealed on Thursday.
Three men from Brooklyn, New York, were arrested on Wednesday and accused of plotting to wage jihad for ISIS. One of the men had offered to kill President Obama if the militants asked him to, authorities said.
U.S. military announces plan to retake Iraqi city of Mosul.
Islamic State militants reportedly have burned to death 45 people in the western Iraqi town of al-Baghdadi on Tuesday, just five miles away from an air base staffed by hundreds of U.S. Marines.
Italy warned that ISIS is at Europe's doorstep as France and Egypt called for the United Nations Security Council to meet over the spiraling crisis in Libya.
President Obama's request for expanded war powers to take on ISIS faces resistance on Capitol Hill.
President Obama says he doesn't need the approval of congress to widen the war against ISIS beyond airstrikes.
The late ISIS commander in Afghanistan and his heir apparent have more in common than their Taliban pasts and a tendency for jihad: both were former Guantanamo Bay detainees.
President Obama delivers a statement on the legislation he sent to Congress to authorize the use of military force against ISIS.
President Obama is expected to formally ask Congress to use military force to go after ISIS.
President Obama is expected to ask Congress for expanded war powers to take on ISIS.
ISIS has claimed that an American female hostage was killed in an airstrike in Syria according to our partners Flashpoint Intelligence.
Two days after news emerged that ISIS had burned a captive Jordanian pilot to death, the Middle Eastern nation hit back.
ISIS militants released a video on Tuesday purporting to show a captive Jordanian pilot being burned alive, just days after the militants beheaded a Japanese journalist.
Network of anti-ISIS "commando cells" has carried out hundreds of guerrilla attacks in a city seized by the Islamist militants, Iraq's vice president told NBC News.
ISIS militants released a video purporting to show two Japanese hostages on Tuesday and demanded a $200-million ransom.
An Ohio man who allegedly wanted to set up an ISIS cell in the U.S. was arrested Wednesday and accused of planning to attack the U.S. Capitol.
Defense Secretary Chuck Hagel is stepping down amid criticism of the president’s national security team on a series of global issues, including the threat posed by the militant group known as ISIS.
President Obama reacts to another beheading by the radical Islamic group called ISIS. Tracie Potts reports.
Woman named "Isis" says her name is causing problems following the rise of the militant army fighting to take over Iraq and Syria. Rachelle Murcia reports.