Livingston Stone National Fish Hatchery in Shasta Lake, California is one of 70 U.S. Fish and Wildlife Service National Fish Hatcheries, and is a vital link in the chain for helping winter Chinook salmon increase their population. A federally endangered species, the work conducted by biologists at Livingston Stone is helping this fish make a comeback after decades of population decline. Listen to this interview with John Rueth, Assistant Hatchery Manager, about the work at the hatchery to conserve Chinook salmon and delta smelt.