A look at what that means for the US strategy in Iraq, and for Iraq's future.
An internationally brokered cease-fire took effect Sunday. But fighting between Army forces and rebels raged in the strategic rail hub, with both sides refusing to withdraw heavy weaponry.
Egypt's airstrikes came in response to the mass beheadings of 21 Egyptian Christians by IS militants in Libya. The Libyan government has called for the US-led coalition in Syria and Iraq to turn its attentions to Libya.
Masked supporters of the Sunni jihadi group beheaded all 21 men simultaneously, filming the production in much the way the group filmed the torturous death of Jordanian pilot Muath Kassasbeh in January.
Nigeria-based Boko Haram militants attacked neighboring Chad for the first time, killing several civilians in a border town. Chad has targeted the Islamist insurgency as part of a regional coalition.
Two Al Jazeera English journalists have posted bail, and the government of President Abdel Fatah al-Sisi has hinted at a pardon. But the press environment is largely hostile.
A news blackout has become an orthodox response to kidnappings in war zones. But is it helping captives survive their ordeals?
Fears of a sectarian war in Yemen increased as the largest protests erupted since the Houthis seized power. The US State Department warned of risks to the diplomatic community in Sanaa.
The Houthis who took control of Yemen's capital hinted they might be willing to work with the US. But there's still the problem of their 'death to America' chants.
Russia-backed rebels say they have surrounded a key transportation hub, while government forces have opened a new front near the port of Mariupol.
The game of chicken between Greece and its international creditors is intensifying as the current loan package is set to expire at the end of the month.
The fate of Mohamed Fahmy, a Canadian, and Baher Mohamed, an Egyptian, hangs in the balance. Their colleague Peter Greste was deported last month to his native Australia.
Militants had stolen arms, ammunition, and armored vehicles during an attack on a multinational military base last month. Their recovery by the Nigerian military marks the latest setback Boko Haram has experienced in recent days.
The ideology that drives Islamic State has its roots in a reaction to Mongol horrors of hundreds of years ago. But Baghdadi and his followers are looking more and more like the villainous grandson of Genghis Khan.
The French and German leaders will then proceed to Moscow. NATO has also announced a 'spearhead' force that will deploy in the Baltics as a deterrent to what many in Europe see as growing Russian assertiveness.
Islamic State militants released a video Tuesday showing the burning to death of a captured Jordanian pilot, igniting anger across the Arab region, but also raising doubts among US coalition allies.
The self-styled Islamic State was trying to send a message by burning Lt. Muath al-Kassasbeh alive. It seems Jordanians are listening.
Al Jazeera journalists Peter Greste and Mohamed Fahmy are lucky to hold foreign passports. Thousands of others aren't so lucky.
A firebomb hit an overnight bus traveling to Dhaka, killing at least seven people. Over the past month, more than 800 vehicles have been targeted.
Separatist leader Alexander Zakharchenko said he would recruit an additional 100,000 men to fight against Ukraine's government troops. Fighting has intensified in 2015 after a lull at the end of the year.