The Pentagon says U.S. special operations forces tried to rescue James Foley and other hostages in a failed raid in Syria earlier this summer.
Black hawk helicopters dropped two dozen commandos at an ISIS-held oil refinery but didn't find any hostages.
President Obama revealed the mission one-day after a video showing James Foley being killed was posted online. In the video, the life of another American journalist was threatened.
President Obama has promised justice for Foley. And the U.S. has launched new air strikes against ISIS targets in northern Iraq.