Job creation came to a halt in August, according to new government data that show an economic recovery that appears to be sputtering out. The Labor Department on Friday reported zero net job creation in August, far worse than the 68,000 net jobs analysts had expected to be added. The unemployment rate was unchanged at 9.1 percent. The July job growth number was revised downward, as well, to only 85,000 jobs added that month — not the 117,000 estimated.