(Refiles to change “almost revised” to “almost reversed” in paragraph 4) By Lucia Mutikani WASHINGTON (Reuters) -The number of Americans filing new claims for unemployment benefits fell slightly more than expected last week, indicating that the labor market recovery was gaining traction. The weekly jobless claims report from the Labor Department on Thursday also showed unemployment rolls shrinking to levels last seen in 1970, underscoring the tightening labor market conditions. There is an acute shortage of workers, with a near record number of job openings, keeping layoffs minimal. “Beyond we…