A tanker carrying crude oil from Iraq's Kurdish region anchors near Ashkelon, Israel. It's believed the oil has been off-loaded into Israel. The U.S. and Baghdad oppose the Kurdish export of oil from the autonomous northern region. David Buimovitch/AFP/Getty Images hide caption

itoggle caption David Buimovitch/AFP/Getty Images

Iraqi policemen take up positions on a bridge north of Baghdad on Monday. There's a consensus among Western and Middle Eastern states that militants from the Islamic State pose a serious threat to the region. But there's no sign yet that countries like the United States, Russia and Iran are prepared to work together. Ahmed Saad/Reuters/Landov hide caption

itoggle caption Ahmed Saad/Reuters/Landov

Cars pack a Kurdish checkpoint as residents flee Mosul in northern Iraq. The city was overrun by Islamic militants last week. Dan Kitwood/Getty Images hide caption

itoggle caption Dan Kitwood/Getty Images

A monument to Ukrainian writer Taras Shevchenko is silhouetted against a sign advertising Russia's natural gas giant Gazprom in Moscow. Gazprom has dramatically increased the price it charges Ukraine in recent months. Alexander Zemlianichenko/AP hide caption

itoggle caption Alexander Zemlianichenko/AP