WASHINGTON, Oct. 22 -- The National Oceanic and Atmospheric Administration issued the following news: Researchers have successfully used cameras operated from a helicopter to map surface water temperatures in Maine's Narraguagus River. This is an important step toward habitat conservation for endangered Atlantic salmon and other migratory fish. "This pilot project is part of our work to locate the habitat that we need to protect, restore, and enhance to ensure these fish can continue to live t  more