There have been no credible threats to the U.S., but the possibility of an ISIS supporter waging an attack is real, authorities said.
Foley was a freelancer for the GlobalPost, which reportedly paid millions to try and track the journalist down. But was it money well spent?
Iraq's three most prominent Sunni electoral groups have withdrawn from talks until the gunmen are brought to justice.
The Obama administration is not ruling out the possibility of intervening in Syria to defeat the Islamic State.
Negotiating with ISIS might have saved James Foley. But the U.S., unlike European nations, doesn't do that -- nor does it pay ransoms.
Islamic State has continued spreading propaganda on the Diaspora and VKontakte social networks.
Raising rates too quickly could weaken the job market as money to expand and create jobs becomes more expensive, Yellen said.