News release: First-Quarter 2008 System Airline Financial Data: Network Passenger Airlines Report Second Consecutive Quarterly Loss Margin – “A group of the seven network passenger airlines reported a system operating loss margin of 5.2 percent in the first quarter of 2008 for the second consecutive quarterly loss after 6 consecutive profitable quarters, the Bureau of Transportation Statistics (BTS) of the U.S. Department of Transportation reported today in a release of preliminary data.”