The World's Largest Retailer

12:01 AM ET Tue, 22 Sept 2009

Walmart is the nation's largest employer with 1.4 million workers in the U.S. and up to 30-thousand new hires annually. But the company'€™s low-cost operating model may be threatened by proposed legislation that would make it easier for unions to organize. A store in Miami may be the first unionized Walmart in the U.S.