Leaders of the Aircraft Mechanics Fraternal Association are urging Northwest Airlines mechanics to prepare for a strike in less than a month even though President Bush says he'll keep the workers on the job past the thirty day cooling off period if an contract agreement isn't reached. The National Mediation Board released the airline and the union from negotiations over the weekend triggering the count down to a March 12th strike the White House says it will block. Minnesota Pubic Radio's Mark Zdechlik reports...