The strange objects witnessed by Navy pilots remain unexplained, but officials briefed on a new study say they are not secret technology from a classified American program. WASHINGTON — American intelligence officials have found no evidence that aerial phenomena witnessed by Navy pilots in recent years are alien spacecraft, but they still cannot explain the unusual movements that have mystified scientists and the military, according to senior administration officials briefed on the findings of a highly anticipated government report. The report determines that the vast majority of more than 120 incidents over the past two decades did not originate from...