The Syrian terror group al-Nusra Front says that its leader has been killed by a U.S. airstrike.
A statement from the group says Abu Yousef al-Turki was killed overnight in U.S.-led airstrikes in Syria. CNN cannot independently verify al-Nusra's claims, but the Syrian Observatory for Human Rights, a monitoring group, says the group was among those targeted during the airstrikes.
Former U.S. Ambassador to the United Nations for Management and Reform, Mark Wallace, is OutFront. Wallace has just launched the counter extremism project, a not-for-profit group working to expose and disrupt sources of funding for extremist groups.
Below, CNN Terrorism Analyst Paul Cruickshank and CNN Military Analyst Retired Colonel Peter Mansoor give their takes on the airstrikes
The U.S. is on a heightened state of alert after the Department of Homeland Security warned of lone-wolf attacks in response to airstrikes on Syria.
This comes as the Pentagon says Monday night's airstrikes targeted not just ISIS but perhaps an even more immediate threat to the U.S. homeland called Khorasan.
According to a U.S. official, Khorasan, an al Qaeda-linked organization, was ready to blow up commercial flights.
CNN's Deborah Feyerick is OutFront with details.
Below, White House Deputy National Security Adviser Tony Blinken weighs in on the attacks.
(CNN) - The Islamic State terror group is now "a credible alternative to al Qaeda" that is "expanding its presence" with foreign fighters returning from Syria, and possibly Iraq, to their home countries, a U.S. intelligence official said Thursday.
The official, who declined to be identified due to the sensitive nature of the information, has direct knowledge of the latest intelligence on the group, also known as ISIS or ISIL.
According to an assessment, the group has grown in size since the spring and its takeover of Mosul in northern Iraq as more fighters from around the world have mainly traveled to Syria to join its ranks.
The United States believes that while the group remains largely focused on its brutal takeover of large areas of Iraq, there is also an "expansion of its external terrorist ambitions."
United States officials are tying the new threat of shoe bombs on airplanes to al Qaeda.
There are indications that the threat could ultimately be tied to Ibrahim al Asiri, the master bomb-maker for al Qaeda in the Arabian Peninsula.
He's the man officials say designed the underwear bomb that failed to detonate aboard a Detroit bound flight on Christmas Day in 2009.
He also built the printer-cartridge bombs that al Qaeda placed on cargo planes destined for Chicago the following year.
Al Qaeda link to shoe-bomb warning
An official tells CNN the new warning is related to recent intelligence gathered on bomb-making tactics believed tied to Asiri.
CNN's Erin Burnett talks to National Security Analyst and Former CIA operative Bob Baer about the latest threat and why Asiri hasn't been caught.
"He's up in the mountains of Yemen," Baer says. "There's no digital footprint that he's left behind. He's read about leaks in this country. He's fairly immune and there's nothing the Yemeni government could do about it."
Is the U.S. trying to make a deal with the Taliban?
There is word the United States is trying to negotiate the release of Army Sgt. Bowe Bergdahl, who has been held captive by a Taliban-affiliated group for nearly five years. He is the only know U.S. prisoner in Afghanistan.
In exchange for Bergdahl, the U.S. would reportedly free five senior Taliban prisoners held at Guantanamo Bay.
For Bergdahl's family in rural Idaho, the wait is excruciating.
OutFront: Gunnery SGT. Jessie Jane Duff, a 20-year veteran of the Marine Corps who provided logistical support to combat units in Iraq and Afghanistan.