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Wall Street ends flat on late comeback



    NEW YORK (Reuters) - U.S. stocks staged a late comeback to end flat on Tuesday despite disappointing earnings from blue-chips including 3M and Johnson & Johnson.

    The Dow Jones industrial average dipped 3.33 points, or 0.03 percent, to 11,977.19. The S&P 500 edged up 0.34 point, or 0.03 percent, to 1,291.18. The Nasdaq Composite gained 1.70 points, or 0.06 percent, to 2,719.25.

    (Editing by Kenneth Barry)