A soldier guards a pipe en route to the Kawergosk Refinery near Irbil, the capital of the autonomous Kurdish region of northern Iraq, in July. Fighting in northern Iraq forced the closure of the country's largest oil refinery, Baiji, and cut production from the Kirkuk oil field this summer. Safin Hamed/AFP/Getty Images hide caption

itoggle caption Safin Hamed/AFP/Getty Images

Jessica Pimentel fills out an application during a job fair in Sunrise, Fla. The latest employment numbers indicate a slowdown in job growth, but many economists are skeptical that the economy is weakening. Alan Diaz/AP hide caption

itoggle caption Alan Diaz/AP

Farmer Seth Watkins (left) and agronomist Matt Liebman stand amid native prairie grasses near Des Moines, Iowa. The conservation strip is used to stop soil erosion. John Ydstie/NPR hide caption

itoggle caption John Ydstie/NPR