Watch business experts debate the effects of Walmart's revised gun policy

Walmart is dramatically stepping back from ammunition sales. The retailer will discontinue all sales of ammunition for short-barrel rifles and handguns. Sam Zell, chairman of Equity Group Investments, Jeff Sonnenfeld, senior associate dean for leadership studies at Yale School of Management, and William Cohan, special correspondent for Vanity Fair, join "Squawk Box" to discuss.