Whither Unions? -- NPR's Don Gonyea reports from Detroit on how unions have fared during AFL-CIO President John Sweeney's first term in office. At the biennial AFL-CIO convention this week in Pittsburgh, there is a sense that organized labor is making a comeback after decades of decline. Sweeney and other union leaders point to the success of the Teamsters strike against U-P-S, an increase in the minimum wage, and evidence that union membership no longer is decreasing. Skeptics offer contrary evidence, such as the failure of unions to organize workers at an auto plant in Tennessee and a textile plant in North Carolina.