 Cheers and boos in the crowd at Cena's surprise appearance at Saturday's Monday in the Bank premium live event. Cena says he'll compete for 30 or 40 events through next year before he actually throws in the towel. Dow futures up 13. This is CBS News. Sponsored by Progressive Insurance. Get renter's insurance to protect the things that make your place a home, including coverage for theft or damage. Visit progressive.com.