An F5 tornado, with winds near 300 mph, tore a one-half mile-wide swath of destruction through central Oklahoma on May 3. Above, an electric transformer explodes as the tornado wreaks havoc near Newcastle. AP/Wide World Photos
Inset: “I was down in my shelter for a minute when I heard this awful racket,” said Delbert Thornhill, owner of this 10 kW Bergey Excel wind turbine. “I peeked out the door, and the building was gone.” Thornhill`s garage was demolished. His wind turbine stood fast, however, suffering only minor damage from debris impacting the machine and tower. Photo courtesy of Steve Wilke, Bergey Windpower Co.