Discovery Labs (NASDAQ: DSCO) says preliminary data shows that its troubled lead drug Surfaxin failed a Phase II study. In fact, Surfaxin looked very much like a placebo in a trial that was aimed at demonstrating the lung drug's ability to reduce the amount of time children with acute respiratory failure spend on mechanical ventilation. Its badly mauled shares dropped even deeper into the cellar as a result, with the stock price falling by about a third--dropping 17 cents to 33...