Many of the victims have been adherents of the minority Yazidi religion.
ISIS has oil, but it also benefits handsomely from the sale of stolen ancient artifacts. The West is a big customer.
New York's Republican Party chairman likened a Bill de Blasio candidacy to Barack Obama's in 2008.
On Tuesday, the Senate will vote on a bill that would authorize the construction of the Keystone XL pipeline.
Several French news outlets claimed on Monday that one of the executioners is a French national named Abou Abdallah Al-Faransi.
Kassig founded Special Emergency Relief and Assistance to provide food and medical supplies to refugees.
"ISIL revels in the slaughter of innocents, including Muslims, and is bent only on sowing death and destruction," President Obama said.
A U.S. official has confirmed the beheading death of Abdul-Rahman Kassig, a New York Times reporter says.
The British PM also denounced what he called Peter Kassig’s apparent "cold-blooded murder" by the Islamic State group.
The authenticity of the video has not yet been confirmed, but it reportedly shows up to a dozen people being beheaded.
Ansar Beit Al-Maqdis, which has pledged its loyalty to ISIS, claimed responsibility for a suicide bombing that killed 30 Egyptian troops.
Greenert and other U.S. officials are urging Congress to end the cuts known as "sequestration," citing growing strains amid increasing threats.
The British Foreign Office is investigating reports "Jihadi John" was injured.
Iraq's biggest oil refinery has been under attack since June.
Kenya has seen a huge influx of refugees as conflicts in South Sudan and Somalia continue to displace hundreds of thousands of people.
FireChat powered the pro-democracy protests in Hong Kong. But the ambition is now much bigger.
Turkey has no seat at the table in the nuclear talks between P5+1 and Iran, but Turkey has quietly been very involved with both sides.
The new laws will allow British police to seize passports of suspects to stop them from travelling abroad.
Ukraine accused Russia on Thursday of sending soldiers and weapons to help separatist rebels in eastern Ukraine launch a new offensive.
Control over the Iraqi city of Baiji is critical to both the Islamic State group and Iraqi Security Forces.
ISIS said it would mint its own silver, gold and copper coins, and launched the "Islamic State Financial System."
Baghdad and Iraqi Kurdistan reached a deal Thursday to ease tensions over oil exports through Turkey.