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

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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

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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

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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

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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

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Jay Blake (left), who served in the Marines, rides the elevator with his fellow students at Sierra Community College in Rocklin, Calif. David Gilkey/NPR hide caption

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In 2010 US Army veteran Jeff Barillaro returned from Iraq with severe PTSD. Since then Barillaro, whose stage name is "Solider Hard," has been rapping about his struggles and performing for troops, veterans, and military families across the US. Erik M. Lunsford/NPR hide caption

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Sgt. Victor Medina suffered brain damage in 2009 when a roadside bomb exploded in Iraq. Blake Gordon/Aurora Photos hide caption

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Heirloom beets served at Bibiana Restaurant in downtown Washington, D.C. Joseph Silverman/The Washington Times /Landov hide caption

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Dr. Alex Dromerick co-directs the Brain Research Center at the National Rehabilitation Hospital. Here he observes Stephen Jones, a policeman who was involved in a motorcycle accident. Becky Lettenberger/NPR hide caption

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The Mall of America in Bloomington, Minn., has implemented a security program aimed at aiding the government identify suspected terrorists. Jim Mone/AP hide caption

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The Mall of America, one of the nation's largest shopping and entertainment venues, is also home to its own counterterrorism unit. Dawn Villela/AP hide caption

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