Walgreen Co...was sued by the Equal Employment Opportunity Commission over claims the company assigned black managers and denied them promotions based on race... Walgreen spokesman Michael Polzin said, ``We're the nation's best represented retailer in urban areas, and managers of all backgrounds are promoted to senior levels from those locations.''... The U.S. agency said a group of current and former black Walgreen managers filed their own lawsuit making similar allegations in June 2005.