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NEW YORK, Aug 12 (Reuters) - U.S. stocks opened down slightly as uncertainty continued to swirl around the situation in Ukraine, with energy shares leading the decline on the S&P 500.
The Dow Jones industrial average fell 29.95 points or 0.18 percent, to 16,540.03, the S&P 500 lost 3.54 points or 0.18 percent, to 1,933.38 and the Nasdaq Composite dropped 6.32 points or 0.14 percent, to 4,395.01.
Reporting by Caroline Valetkevitch; Editing by Nick Zieminski