Nov. 9 (Bloomberg) -- Job openings in the U.S. dropped in September for a second month, signaling a sustained labor market rebound will take time to develop, a government report showed. Openings decreased by 163,000 to 2.93 million, the Labor Department said today in Washington. The number of people hired rose from the prior month and separations declined. The unemployment rate was 9.6 percent for a third month in October even as payrolls increased 151,000, Labor Department figures showed last week. Growth in the world’s largest economy may need to quicken before enough jobs are created to make up for...