VIDEO: The Islamic State is digging tunnel systems to ambush its enemies
It's also using them to evade airstrikes.
UN Security Council mulls how to help Syria's Yarmouk civilians
Officials are looking into ways to evacuate those who want to leave the camp.
Life in Yarmouk is 'beyond inhumane'
The Islamic State continues to control large parts of the Yarmouk refugee city outside of Damascus, Syria. It's hard to imagine a worse scenario.
Looting and lynching in Tikrit bodes ill for Iraq’s fight against the Islamic State
Can Iraq win back Sunni cities without further deepening the sectarian resentment that allowed the militant group to capture those areas in the first place?
Qaeda advances on Syria army base near Idlib: Monitor
Fighters from Al-Qaeda's Syrian affiliate and allied militants advanced Friday on a key government-held military base in northwestern Idlib province, a monitor said.
Islamic State seizes most of Yarmuk refugee camp in Damascus: PLO
The camp has been under siege for a year.
Syria's war has drastically changed the lives of millions. Here are just four of their stories
Four years into Syria's war, extremists dominate the news. These are the stories that don't make the headlines.
Syria says this is the US Predator drone it shot down on Tuesday (VIDEO)
The karate teacher who took the fight to Bashar al-Assad
Abu Hamza once taught the children of government employees how to fight, now he leads a rebel brigade fighting the government.
This is how the war in Syria looks to an Assad supporter
'Normal people didn’t want to have a so-called revolution. We didn’t want anything like that.'
The refugee from Homs who can hardly afford to feed his family
Ahmad worked real estate before the war, now he cannot afford to put a roof over his own head.
Kerry says US will have to negotiate with Syria's Assad
The rise of a common enemy, hardline militant group Islamic State, appears to have slightly softened the West's stance towards the Syrian leader.
A Syrian architect waits to return and rebuild her country
Bayan Ali stayed and protested for as long as she could. Now, she is preparing to rebuild her country when the war ends.
Syria's beleaguered opposition-in-exile is about to collapse
The internationally recognized opposition has been plagued by infighting, incompetency and accusations of corruption since its inception.
9 Syrian artists telling the stories of a country torn apart by war
'Art can't save the country, but it can rebuild the places,' said Tammam Azzam.
What four years of conflict have done to Syria — in one infographic
Approximately 6 percent of the country's population has been killed or injured during the past four years.
Only 3 percent of the lights are still on in Aleppo, Syria
Eighty-three percent of all the lights in Syria have gone out since the start of the conflict four years ago. In hard-hit Aleppo, it's 97 percent dark.
Meet the Syrian sheikh battling Islamic State ideology one mind at a time
'When the funding came from the sheikhs, people grew beards. When the funding came from the international community, people started to shave and wear suits.'
Before 'Jihadi John,' Mohammed Emwazi was 'extremely gentle, soft-spoken'
After the naming of Islamic State's masked henchman, his alleged extreme violence gives an urgent note to the efforts to understand who he is and where he came from.
For richer, for poorer: Jihadi John is a reminder that extremism comes in all shapes and sizes
Analysis: The White House's focus on poverty as the main cause of extremism may not tell the whole story.
US charges 3 with conspiring to support Islamic State, planning attacks
All three men live in Brooklyn in New York City.
Syrian government behind new spate of barrel bomb attacks, says Human Rights Watch
Government forces have carried out hundreds of indiscriminate air attacks on civilian areas.
Islamic State in Syria abducts at least 90 from Christian villages: monitor
Military experts following Syria said IS was trying to open a new front after its string of losses since being driven from the Syrian town of Kobani.
Syrians slowly return to Kobani after Kurds win back town from Islamic State
Almost the entire population of the town fled across the border to Turkey last year to escape Islamic State's advance.
Kobani residents in limbo as they wait to return to a destroyed city
The Islamic State was repelled from the city weeks ago, but residents have been unable to return home.
Come home, families beg Syria-bound UK schoolgirls
The three girls flew to Istanbul on a Turkish Airlines flight from London's Gatwick airport.
Joining the Islamic State is still remarkably easy
Analysis: Despite efforts by Turkish authorities to crack down on wannabe jihadists crossing into Syria, the number of foreign fighters continues to grow.
Obama says world needs to address the problems that fuel terrorism
In counterterrorism speech, the American president said extremism builds when millions are left impoverished.
Scores killed in battles in Syrian city of Aleppo, monitor says
The United Nations is seeking a ceasefire there, a step towards addressing the crisis in Syria which is about to enter its fifth year.
Egypt bombs Islamic State targets in Libya after beheadings
Taking a page from Jordan, Egypt quickly retaliated for the beheading of 21 Egyptian Christians.
Assad denies using barrel bombs, just as barrel bombs fall on Aleppo
The Syrian president has denied that his forces use the indiscriminate explosives, but there's a wealth of evidence demonstrating their use.