Some of Hurricane Katrina's highest winds, not water, damaged the home of Paul and Julie Leonard of Pascagoula, who are suing their insurance company, Ohio-based Nationwide Mutual Insurance Co. to pay for $130,000 in damage to the home. On Wednesday an engineer testified in what could be a landmark federal trial for other Katrina cases. Structural engineer Peter de la Mora, a witness for the Leonards, testified that their roof has to be replaced due to damage from wind and wind-driven rain.