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.
Representatives Mac Thornberry and Tom Cole touched on two subjects today in Wichita Falls that involve U.S. troops and pose a big threat to this country.
A suburban teen from the Chicago area was arrested at O'Hare International Airport over the weekend and accused of attempting to provide aid to ISIS
A short video released by ISIS on Friday shows the apparent beheading of British aid worker Alan Henning.
British lawmakers have voted to join the U.S.-led coalition of nations launching airstrikes on Islamic State group militants in Iraq, committing warplanes to the struggle against the extremists.
The new Iraqi Prime Minister says that ISIS is planning to strike, but U.S. officials say there is no specific, credible information about that. Tracie Potts reports.
President Obama comments on U.S. airstrikes against ISIS targets in Syria, saying "the U.S. will not tolerate safe havens for terrorists."
Islamist militants controlling parts of Iraq and Syria have purportedly released a new audio recording warning Americans that "you will not feel secure even in your bedrooms."
The Senate gave final approval on Thursday to President Obama’s plan to train and arm Syrian rebels, endorsing a key plank of the president's strategy for taking on the Islamic State.
The Senate debates whether or not to arm Syrian rebels in the fight against ISIS. Tracie Potts reports.
Joint Chiefs of Staff Chairman Gen. Martin Dempsey tells Senators that new air campaign won't be "shock and awe" but instead "persistent and sustainable". Steve Handelsman reports.
The U.S. carried out an airstrike near Baghdad on Monday in what a defense official described to NBC News as the beginning of intensified action against ISIS militants in Iraq.
Secretary of State John Kerry works to build international coalition to take on ISIS in Iraq and Syria. Steve Handelsman reports.
A new NBC poll shows Americans are behind President Obama's plan to defeat ISIS, but they're skeptical that it will work. Tracie Potts reports.
Thirteenth District Congressman Mac Thornberry says the president took a different tone in his address to the nation Wednesday night, but now he need to put that plan into action.