Tornadoes start as offshoots of thunderstorms but can end up as devastating forces in their own right, carving a path of destruction scores of miles long and more than a mile wide. #5The "Gainesville Tornado" was actually a pair of tornadoes that converged April 6, 1936, in Gainesville, Georgia. The F4-rated twisters killed 203 people and injured 1,600, and destroyed four city blocks and 750 houses. Shown here, past the train tracks, are some of the buildings in the north Georgia town that were damaged by the tornado. #4The