U.S. Secretary of State John Kerry shakes hands with Israeli Prime Minister Benjamin Netanyahu in Tel Aviv on July 23. While the two countries are close allies, they have exchanged criticism during the recent Israel-Hamas fighting in Gaza. Pool/AFP/Getty Images hide caption

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An Israeli Merkava tank drives past a field of sunflowers along the border between Israel and the Gaza Strip as it moves out of the Gaza Strip on Aug. 3. Gil Cohen Magen /AFP/Getty Images hide caption

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An Israeli soldier stands inside an underground tunnel built by Hamas militants leading from the Gaza Strip into Southern Israel. Israel says it has destroyed 32 similar tunnels so far in the nearly monthlong conflict. Ilia Yefimovich/Getty Images hide caption

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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

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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