FIDEL CASTRO TAKES MANHATTAN

MORTIMER ZUCKERMAN, THE REAL estate and publishing magnate, was throwing a typically glamorous luncheon at his Fifth Avenue apartment. Gathered at one table were takeover maestro Henry Kravis, billionaire Laurence Tisch, New Yorker editor Tina Brown and her husband Harry Evans, the head of Random House, along with some luminous stars of TV journalism--Diane Sawyer, Mike Wallace, Peter Jennings and Barbara Walters. It was a pretty predictable guest list for this crowd. But there was someone sitting at the same table who does not make a regular haunt of Fifth Avenue apartments. Uncharacteristically dressed in a suit, his beard a thinning...