WASHINGTON (Reuters) - U.S. job openings fell in February, suggesting the labor market was losing momentum even before stringent measures to control the coronavirus outbreak shuttered businesses, throwing millions out of work.Job openings, a measure of labor demand, decreased 130,000 to 6.9 million, the Labor Department said on Tuesday in its monthly Job Openings and Labor Turnover Survey, or JOLTS. Vacancies peaked at 7.5 million in January 2019. The job openings rate slipped to 4.3% in..