Sometimes I like to shop at Walmart just for the people watching!
Walmart also owns Sam's Club retail warehouses all across the country!
I was at Walmart the other day, and they had car batteries fo $30. I need to remember that next time I need one.
Walmart denies wrong doings and says that low prices are the result of hard work and efficiency. 
Well they seem to aggressively negotiate contracts with their vendors as well.
Walmart even has a Canadian division called Walmart Canada Corp!