THE MAN WHO KNEW -- Harry Markopolos repeatedly told the Securities and Exchange Commission that Bernard Madoff's investment fund was a fraud.  He was ignored, however, and investors lost billions of dollars.  Steve Kroft reports.  Andy Court and Keith Sharman are the producers.

FOR BETTER OR WORSE - Foreigners who marry Americans are entitled to become permanent residents of the U.S., but in a stricter post-9/11 world, hundreds of widows are being asked to leave the country because their husbands died - even some whose children were born in the U.S.  Bob Simon reports. Robert Anderson is the producer.

THE MOTHER OF SLOW FOOD - She has been cooking and preaching the virtues of fresh food grown in an environmentally friendly way for decades.  A world-class restaurant and eight cookbooks to her credit, Alice Waters has become famous for her "slow food" approach - an antidote to fast food. Lesley Stahl reports.    Ruth Streeter is the producer.

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