American employers unexpectedly cut 92,000 jobs last month, a sign that the labor market remains under strain. The unemployment rate blipped up to 4.4%.The Labor Department reported Friday that hiring deteriorated from January, when companies, nonprofits and government agencies added a healthy 126,000 jobs. Economists had expected 60,000 new jobs in February.Revisions also cut 69,000 jobs from December and January payrolls.The job market had been expected to rebound this year from a lackluster 2...