NEW ORLEANS - Fair Grounds Race Course, which was shredded two years ago by hurricanes Katrina and Rita, narrowly escaped another disaster early Tuesday morning when a tornado passed right over the barn area without causing significant damage. At 2:55 a.m., a tornado smashed into Westwego, across the Mississippi River from Fair Grounds, then bounced over the river and landed in the Carrollton section of the city just west of the track, where it caused widespread damage and injured 25 people.