THE ZONE - Geoffrey Canada's remarkable experiment in inner-city education, the Harlem Children's Zone, has helped put historically low-achieving students in New York City on academic par with their grammar-school peers. CNN's Anderson Cooper reports. Tanya Simon is the producer. PERSONAL FOUL - Disgraced ex-NBA referee Tim Donaghy speaks for the first time about betting on pro basketball games, his Mafia involvement and subsequent prison term. Bob Simon reports. Robert Anderson is the producer. (This is a double-length segment.)