Sam Walton's estate planning is drawing attention after a Miami attorney described how the Walmart Inc. (NASDAQ:WMT) founder walled off his heirs' stake from divorce courts, avoiding the kind of splintering that wrecks family fortune. Miami Attorney Details Walton Dynasty Protection Strategy Jose M. Ferrer, a highly rated attorney in Miami, Florida, specializing in business litigation, international litigation and arbitration and complex commercial cases, said Walton's key move was keeping Walmart stock out ...