Salmon that has been genetically modified to grow twice as fast as normal could soon show up on American dinner plates. That is, if the company that makes the fish can stay afloat. --snip-- Using gene-manipulating technology, Aquabounty adds a growth hormone to the Atlantic salmon from another type of salmon called the Chinook. The process, company executives say, causes its salmon to reach maturity in about two years, compared with three to four years for a conventional salmon. Aquabounty executives say if their fish are approved for commercial sale, there are several safeguards designed to prevent the fish from...