Given a moment alone with Sen. John Kerry, the president of Pittsburgh's firefighters union did what has become his No. 1 job. He asked for help in fighting city spending cuts that would put 168 of his members out of work. Friends of labor such as Kerry and union leaders across the nation are getting the call from Pittsburgh, as the cradle of the union movement once again becomes a battleground for workers. Local labor leaders frame the fight over Pittsburgh budget cuts as a struggle for organized labor's future everywhere.