FILE &#8211; In this April 2, 2012 file photo, a 4-year-old Atlantic salmon is held at the National Fish Hatchery in Nashua, N.H. The federal government outlined an ambitious, potentially costly new plan to restore Atlantic salmon in the United States, where rivers teemed with the fish before dams, pollution and overfishing decimated their populations. The Atlantic salmon has declined in the U.S. to the point where the last remaining wild populations of in the U.S. exist only in a handful of rivers in Maine.  (AP Photo/Jim Cole, File)