What's behind the stock market sell-off?
The markets are coming off the biggest two days of losses since February. The Dow Jones Industrial Average lost nearly 546 points Thursday, a 2.1 percent drop, on top of an 831-point plunge on Wednesday. The S&P 500 was also down 2.1 percent. CBS News business analyst Jill Schlesinger joins "CBS This Morning" to discuss what's behind the sell-off.