When dozens of people across the country got sick from eating contaminated romaine lettuce this spring, Walmart did what many grocers would do: It cleared every shred off its shelves, just to be safe.

On the surface, there doesn't seem to be a lot to Walmart. It's likely seen as little more than a globe-spanning grocery store chain with relatively cheap goods. Digging a bit deeper into the less ...

Walmart supercenters are renowned for containing multitudes: thousands of apparel items, aisles of groceries, and rows of electronics, home goods, and beauty supplies can be on the floor at any given ...