US opens criminal probe into journalist James Foley's killing
Outraged US allies have pledged to help in the battle against the Islamic State, sending in weapons and other aid to Kurdish forces fighting the extremists in northern Iraq.
Aid airlift to northern Iraq has started, UN says
'This is a massive logistics operation ... to help the hundreds of thousands of desperate people who have fled suddenly with nothing but their lives,' UN High Commissioner for Refugees Antonio Guterres said.
UN launches 'significant aid push' for half a million people fleeing violence in Iraq
'The fact that you see people fleeing via Syria to safety speaks very much to how desperate the situation is,' UNHCR spokesman Adrian Edwards said.
Iraqi and Kurdish forces have regained control of Mosul dam, Obama says
The latest northern Iraq offensive by Islamic State militants has rattled the Baghdad government and its Western allies.
Kurds retake Iraq's main dam from Islamic State
Bolstered by US airstrikes against the extremist forces, a Kurdish official says peshmerga fighters 'liberated' Mosul dam.
UK must use its 'military prowess' to help stop the Islamic State: prime minister
David Cameron used his toughest words yet on the crisis.
This 84-year-old woman crawled on her knees to safety to escape the Islamic State
Extremist militants in Iraq demanded that this elderly Yazidi woman convert to Islam or die. She said she'd rather die. Here's her amazing story of survival.
Islamic State kills dozens in northern Iraq 'massacre'
A senior official of the Patriotic Union of Kurdistan party put the death toll at 81.
US says 'far fewer' Yazidis are stranded on Iraq's Mount Sinjar than feared
For those who managed to escape the siege, the relief of reaching relative safety was tempered by the spartan conditions of refugee camps.
This map shows why it's so hard to get much-needed aid to 1 million people displaced in Iraq
With the Islamic State taking over large parts of the country, it's almost impossible for aid groups to reach all those in need.
How scared should Americans be of the Islamic State?
The United States is grappling with the risk level of the extremist militants retaliating as Obama inserts military might into Iraq.
Arming the Kurds could be a big mistake for the US. Here's why
The Kurdish peshmerga are battling the Islamic State and winning the world's affection. But step back for a minute. There's reason to be concerned.
Kerry says Iraq's new leader could win more US support
Haider al-Abadi is seen as a far less polarizing, sectarian figure than Iraqi Prime Minister Nouri al-Maliki.
Political chaos grips Iraq amid deepening humanitarian crisis (LIVE BLOG)
With the Islamic State making new gains over Kurdish forces, the US is renewing its call for Iraqis to form a consensus government.
This man has lost 63 relatives to the Islamic State
IS militants have kidnapped nearly every member of Assad Haig's family. He'll risk his life to get them back.
Iraq says Islamic State killed 500 Yazidis, buried some victims alive
The Yazidis are followers of an ancient religion and are part of Iraq's Kurdish minority. Many of their villages were destroyed when Saddam Hussein's troops tried to crush the Kurds.
US launches strikes on Islamic State in Iraq (LIVE BLOG)
Here we go again.
60 Seconds on Earth: What it's like to be displaced by the Islamic State (VIDEO)
'We left our money, our house, everything behind and ran.'
Islamic State's advance forces thousands of Iraqi Christians to flee
The Islamic State sees Iraq's majority Shia and minorities such as Christians and Yazidis, a Kurdish ethno-religious community, as infidels.
Kurdish forces and Islamic State militants clash in northern Iraq
Meanwhile, Iraqi Prime Minister Nouri al-Maliki warned that any unconstitutional attempt to form a new government would open 'the gates of hell' in Iraq.
There are reports of the Islamic State executing dozens of Yazidis
The Yazidis in northern Iraq are used to being persecuted, but this attack was bad. The Islamic State captured Sinjar, forcing thousands from their homes.
True or false? 15 rumors about the Islamic State, fact-checked
Can you tell which are real and which are fake? Lots of news organizations couldn't.
Baghdad's police force is being flooded by inexperienced volunteers
The new trainees are mostly Shia. That might only increase sectarian conflict.
Spend an evening with Baghdad's speed-loving stunt drivers (PHOTOS)
Islamic State? What Islamic State? Who?
Is this the man who broke Iraq?
Sunni dissenters blame Prime Minister Nouri al-Maliki for the fall of northern Iraq to the jihadists. But some also say the US shares the blame.
At home with Ahmed Chalabi
The once-discredited Iraqi politician is back, within striking distance of the prime minister spot. And he has book recommendations.
Day 1,224: The Islamic State is running bus tours
Because that sounds like fun.
The Islamic State, which is taking over Iraq, is now forcing shopkeepers to veil their mannequins
It appears that in the group's interpretation of Sharia law, statues in human form are banned.
The Islamic State is kicking out Christians
Sunni militants aren't putting themselves in good historical company with this latest move, which includes marking Christian homes, expelling their owners, and taking everything they own.
The wider struggle for Iraq is playing out in Baghdad's neighborhoods
'Frankly if your mother and father hadn't been with you, I would have killed you,' a Shia militia fighter told Ra'id a few weeks ago.
Pictures from Kirkuk, where daily life continues despite extremist threat
The Islamic State may be pushing up against the city from two sides, but Kirkuk's streets pulse with life — and diversity.