U.S. sought data from 15 Apple iPhones in last four months

By Nate Raymond NEW YORK (Reuters) - Court records released on Tuesday show the U.S. Justice Department has in the last four months sought court orders to force Apple Inc to help investigators extract data from 15 iPhones in cases across the country. The disclosure comes amid a heated dispute between Apple and federal investigators over access to a locked iPhone belonging to one of the killers in December's mass-shooting in San Bernardino, California. In a letter unsealed on Tuesday addressed to