China's President Xi Jinping speaks at the Asia-Pacific Economic Cooperation Summit in Manila, Philippines, on Wednesday. Xi condemned the killing of a Chinese citizen by ISIS, but did not specify any actions that China might take. SeongJoon Cho/Bloomberg via Getty Images hide caption

toggle caption SeongJoon Cho/Bloomberg via Getty Images

In a Kabul demonstration last week, Afghan protesters carry a coffin with the decapitated body of one of seven Shiite Muslim Hazaras abducted and killed in southern Afghanistan. Officials blamed Afghan militants loyal to ISIS for the killings. Thousands of protesters marched in Kabul to demand justice for the victims, who included a 9-year-old girl. Shah Marai/AFP/Getty Images hide caption

toggle caption Shah Marai/AFP/Getty Images

A member of the Syrian government forces stands next to a well at Jazel oil field, near the ancient city of Palmyra, after they retook the area from the Islamic State in March. U.S.-led airstrikes have targeted oil facilities run by ISIS, which, according to some estimates, earns as much as $1 million per day from oil sales. STR/AFP/Getty Images hide caption

toggle caption STR/AFP/Getty Images


Hitting ISIS Where It Hurts By Striking Oil Trucks

Illicit oil sales generate large revenues every day for the Islamic State. The U.S. airstrikes could dry up a significant stream of cash for the group.

Listen Loading… 2:48
  • Playlist
  • Download
  • Embed
    <iframe src="" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

An Islamic State supporter waves the group's flag in its de facto capital of Raqqa, Syria, in June 2014. The group had focused on building its caliphate, or Islamic empire, in the Middle East. But it has claimed three major attacks recently, leading to a reassessment of the group and its goals. STRINGER/Reuters/Landov hide caption

toggle caption STRINGER/Reuters/Landov

People gather to look at a burnt car following a bomb explosion that rocked a roundabout near the crowded Monday Market in Maiduguri, Nigeria, on July 1, 2014. The city has been repeatedly hit by Boko Haram terrorists. A recent report found that in 2014, the group was responsible for more known deaths from terrorism than any other organization. Stringer/AFP/Getty Images hide caption

toggle caption Stringer/AFP/Getty Images

British daily newspapers from earlier this year showed the masked killer now identified as ISIS figure Mohammed Emwazi. He was targeted Thursday by the U.S. in an airstrike in Raqqa, Syria. Daniel Sorabji/AFP/Getty Images hide caption

toggle caption Daniel Sorabji/AFP/Getty Images

People gather near the site of a twin suicide attack Thursday in Burj al-Barajneh, southern Beirut, Lebanon. The self-proclaimed Islamic State has claimed responsibility for the attack. Bilal Hussein/AP hide caption

toggle caption Bilal Hussein/AP

A photo of the ancient Roman city of Palmyra, Syria, released May 17, shows the site where Islamic State militants have destroyed a nearly 2,000-year-old arch and ancient temples. SANA/AP hide caption

toggle caption SANA/AP

Members of the Minneapolis Somali community waited in May to enter the U.S. Courthouse where a federal judge ordered four Minnesota men, accused of trying to travel to Syria to join ISIS, to be held pending trial. Jim Mone/AP hide caption

toggle caption Jim Mone/AP