Lena Sun, Washington Post, August 2, 2010 The union representing 1,600 nurses at Washington Hospital Center voted overwhelmingly over the weekend to approve a one-day strike to protest the firing of 18 nurses who failed to report to work during and after the February snowstorms, a union spokeswoman announced Monday. With 675 nurses voting, members voted 526-147 in favor of a one-day strike, more than the two-third majority required. Two members abstained. Nine of the nurses have since returned to work. The union had argued that hospital used unfair labor practices when it fired the nurses for not reporting to work. ... Nurses