Why the boom in the underground shelter business? Vince Gonzales interviews Ron Hubbard, owner of Atlas Survival Shelters in Montebello, Calif., to find out why he has seen such a surge in purchases of his ?underground homes.? Madeleine Brand interviews New York Magazine correspondent Kyle Buchanan to get his take on the year? s most award-worthy movies as well as what films are worth the cost of admission this holiday season. And something new in billboards: artist Stephen Glassman has a plan to turn some of the signs into sustainable living bamboo gardens.