WASHINGTON (AP) — U.S. employers added a surprisingly robust 379,000 jobs last month, a sign the economy is strengthening as virus cases drop, vaccinations ramp up, Americans spend more and states ease business restrictions. The February gain marked a pickup from the 166,000 jobs added in January and a loss of 306,000 in December. Yet it represents just a fraction of the 10 million jobs that were lost to the pandemic. The unemployment rate fell to 6.2%, the Labor Department said Friday in its monthly jobs report.