CLEVELAND (AP) _ Cliffs Natural Resources Inc. (CLF) on Thursday reported a first-quarter loss of $28.1 million, after reporting a profit in the same period a year earlier. The Cleveland-based company said it had a loss of 11 cents per share. The results did not meet Wall Street expectations. The average estimate of five analysts surveyed by Zacks Investment Research was for earnings of 16 cents per share. The mining company posted revenue of $461.6 million in the period.