The injuries Jack Blankenship sustained after a 300-pound rock pinned him to the ground while working in a coal mine prevent him from sitting for long periods of time or walking far. He says he's in constant pain. Anna Boiko-Weyrauch/NPR hide caption

itoggle caption Anna Boiko-Weyrauch/NPR

Democratic U.S. Sen. Mary Landrieu of Louisiana walks through the U.S. Capitol on Wednesday. Congress returned to work following last week's midterm elections break. Landrieu is locked in a runoff with Republican Rep. Bill Cassidy. Mark Wilson/Getty Images hide caption

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Pedestrians pass the display windows at Bonhams New York auction house. The Mexican government accuses Bonhams of auctioning off artifacts that were stolen from Mexico, and says others that were offered as ancient were modern fakes. Bebeto Matthews/AP hide caption

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Few police departments have required officers to wear body cameras, but that's changing after the events in Ferguson, Mo., this summer. Jim Mone/AP hide caption

itoggle caption Jim Mone/AP

Workers assemble Volkswagen Passat sedans at the German automaker's plant in Chattanooga, Tenn., on June 12, 2013. The automaker announced a new policy Wednesday that would allow interaction with labor unions at the plant. Erik Schelzig/AP hide caption

itoggle caption Erik Schelzig/AP

State Reps. Barry Moore, Joe Hubbard, Rod Scott and Merika Coleman study a map of the proposed redistricting plan in May 2012 following a meeting of the Legislative Committee on Reapportionment at the Alabama Statehouse in Montgomery, Ala. Dave Martin/AP hide caption

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This photo of Roy Middleton working underground at the Kentucky Darby mine now sits on the mantel in the Middleton home in Harlan County, Ky. He was killed after an explosion in 2006. Anna Boiko-Weyrauch/NPR/Original photo courtesy of the Middleton family hide caption

itoggle caption Anna Boiko-Weyrauch/NPR/Original photo courtesy of the Middleton family

Jay Ruskey grows coffee next to avocados on his farm, Good Land Organics, in Goleta, Calif. The two crops are often grown together in Central America, partly because they can share fertilizer and water. Lisa Morehouse/KQED hide caption

itoggle caption Lisa Morehouse/KQED