Northwest Airlines says it will help its regional airlines Mesaba and Express One resume flying.....within the constraints of its current pilot strike. That comes in response to a federal transportation department order last Friday. Mesaba and Express One shut down their operations last week saying they were too intertwined with Northwest to fly when Northwest pilots were on strike. Minnesota public radio's Elizabeth Stawicki reports: The department of transportation ordered Northwest to provide its regional airlines with the same resources it gave them *before* Northwest pilots went on strike. That includes: ticketing; scheduling, banking and ground services. Northwest said it cannot guarantee how long or to what it extent it will help Mesaba and Express One...but it will *try* to help both airlines get back in the air.