. >> well, myat was denied coverage three times before the pact act. on his fourth appeal this month, the v.a. finally ruled that his cancer is a result of his deployments. so for more on filing a claim and which illnesses are now covered, you can visit cbsnews.com. >>> all right. turning now to the economy, which continues to outpace expectations. today the commerce department said the nation's gdp grew by an annual rate of 2.9% in the fourth quarter. and some more good news, consumer spending was up 2.1%. one place where consumers like to spend money is online, and many are using buy now, pay later. it's a new popular trend with consumers spending billions on these new payment programs. in tonight's money watch, cbs's nancy chen takes a look at the risk and benefit of this booming industry. >> buy now, pay later, how does that work? >> reporter: for online shoppers, the appeal seems obvious. ♪ oh, yes ♪ >> reporter: zero-interest loans, smaller payments spread out, and unlike layaway, shoppers get their purchases immediately. but that ease of buying