ISIS, ISIL, Islamic State. Which one is right?
The speech comes as two-thirds of Americans back the use of U.S. military might to defeat the Islamist terrorist group
A Sotloff family spokesman said the Islamic State paid up to $50,000 to rebels who told the militant group the 31-year-old journalist had entered Syria
Obama and Cameron call for stronger NATO alliance as ISIS and Ukraine dominate summit talks
A video of ISIS allegedly executing Steven Sotloff, a second captive American journalist has emerged.
Rogers, chairman of the House Intelligence Committee, said it's difficult to keep track of all Americans who have trained with ISIS fighters
Islamic State militants and their supporters "have demonstrated the intent and capability to target American citizens overseas," an official said
"Stay strong because I am going to need your help to reclaim my life."
Russia urged Western and Arab nations to overcome their distaste of the government in Damascus and engage with it to fight the hardline insurgents
White House deputy national security adviser Ben Rhodes told reporters the United States stands ready to take action to protect American citizens
The outlawed Kurdistan Workers' Party (PKK) has been condemned for its three-decade insurgency against the Turkish state
Foley had been missing since he was kidnapped in Syria last year.
The Iranian-backed Hezbollah has been helping Syrian President Bashar al-Assad fight a Sunni Islamist-dominated insurgency
There is "no American military solution to larger Iraq crisis," President Obama warned
Some of the victims were buried alive, Iraq's human rights minister said.
Obama said U.S. airstrikes have destroyed arms and equipment that Islamic State insurgents could have used to attack Arbil but warned the current operation in Iraq could take some time