The PBF Energy refinery in Paulsboro, N.J., uses toxic chemicals such as hydrofluoric acid. Rather than using "inherently safer" design methods, the industry says, other safety measures are taken to prevent accidents like the one in West, Texas. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

Deuk Chamnan (right), a credit officer at First Finance, speaks with a potential client while passing out leaflets at Century Market in Phnom Penh. First Finance also advertises on the radio. Will Baxter for NPR hide caption

itoggle caption Will Baxter for NPR

A sockeye salmon that was caught from the research vessel Miss Delta off the coast of Vancouver is examined. The MSC has certified the fish as "sustainable" even though there is concern from scientists and environmentalists. Brett Beadle for NPR hide caption

itoggle caption Brett Beadle for NPR

Dennis Roseman, left, and Jamie Manganello pull in a swordfish off the coast of Florida. The Day Boat Seafood company went through a complicated process to become certified as a sustainable fishery by the Marine Stewardship Council. Chip Litherland for NPR hide caption

itoggle caption Chip Litherland for NPR

Capt. Art Gaeten holds a blue shark that was caught during a research trip in Nova Scotia. Scientists are studying the impact of swordfish fishing methods on the shark population. Dean Casavechia for NPR hide caption

itoggle caption Dean Casavechia for NPR

Retired Army Major Michelle Dyarman holds the Purple Heart medal she was awarded after suffering a severe concussion from an IED in Baghdad in 2005. Robb Hill for NPR hide caption

itoggle caption Robb Hill for NPR

A training session for instructors who teach hand-to-hand combat, or combatives, at the Fort Benning military base in Georgia. Pouya Dianat for NPR hide caption

itoggle caption Pouya Dianat for NPR