The Deepwater Horizon oil rig burns in the Gulf of Mexico in April 2010. The rig's crew were new to their positions just before the explosion. Such staffing reorganizations are increasingly common as the industry grapples with a staffing shortage. U.S. Coast Guard/Getty Images hide caption

itoggle caption U.S. Coast Guard/Getty Images

In a video from the Horatio Alger Association, William Doré tells of a tense and abusive childhood. Horatio Alger Association/YouTube hide caption

itoggle caption Horatio Alger Association/YouTube

The GasBuddy app and website rely on crowdsourcing — people across the country sending in gas prices. NPR hide caption

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A driver pumps gas in Los Angeles, where prices are among the highest in the country, topping $4 a gallon. Frederic J. Brown/AFP/Getty Images hide caption

itoggle caption Frederic J. Brown/AFP/Getty Images

A 1974 Gremlin covered with Mardi Gras beads is part of the auction lot of items from the former Kenner Mardi Gras Museum. The car is expected to draw several bids. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

A Shell-owned ethylene cracker plant on Pulau Bukom, Singapore. Several U.S. states are competing for a similar plant the company plans to build in northern Appalachia. Courtesy of Shell Chemicals hide caption

itoggle caption Courtesy of Shell Chemicals

The town of Nitro has its beginnings in 1917, when the U.S. government created it as a place to locate a munitions plant. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR