This March 6, 2013 file photo shows a Staples office supply store Miami. The opening of Postal Service retail centers in dozens of Staples stores around the country is being met with threats of protests and boycotts by the agency's unions. The new outlets are staffed by Staples employees, not postal workers, and labor officials say that move replaces good-paying union jobs with low-wage, nonunion workers. (AP Photo/ Lynne Sladky, File)