By Melissa Allison, Chicago Tribune Knight Ridder/Tribune Business News
Dec. 7--One year ago, Robyn Eulo walked the terminals of O'Hare International Airport frightened for her job and her company.
It was Dec. 9, 2002, the day United Airlines filed for bankruptcy.
The carrier's dire action followed a long global decline in air travel that struck a blow to airlines worldwide and exposed the vulnerability of United's high cost structure and its inability to reduce labor costs. Even a federal agency set up to rescue airlines in the aftermath of