http://www.reuters.com/article/idUSNLL3KE6FN20100903 US econ growth gauge fell to a 6-week low- ECRI Fri Sep 3, 2010 10:30am EDT NEW YORK, Sept 3 (Reuters) - A measure of future U.S. economic growth fell to a six-week low in the latest week, while the annualized growth rate fell to a 3-week low, a research group said on Friday. The Economic Cycle Research Institute, a New York-based independent..