A female member of a United Airlines crew flight attendant, nears the top of an escalator at the Chicago O'Hare airport terminal, USA. Holding the wheelie case with one hand, it stands upright on the travelator, ready to be pulled along the floor to the departure gate. A family picture of a little girl smiles out from behind a plastic protective sleeve - a clue that the woman's daughter might be waiting for her mother to return home safely after the next flight.