FILE - Amid the ruins and battered possessions of a home lies a wrecked dog house bearing a "Xenia Lives" sticker on April 18, 1974, in Xenia, Ohio, distributed by a local church on Easter Sunday. Manny Kazee, background, helps in the cleanup of a neighbor's home in the Ohio town devastated by the tornado of April 3. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak.(AP Photo/Steve Pyle, file)
FILE - A flag hangs at half mast between a blasted tree and what is left of a house in Xenia, Ohio, April 3, 1974. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo/Steve Pyle, file)
FILE - An aerial view of Xenia, Ohio, which was hit by tornados late April 4, 1974. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo/ Barry Thumma, file)
FILE - School buses rest April 5, 1974, on the remains of the high school where they were tossed in Xenia, Ohio, by a tornado that went through the town. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo, file)
FILE - A tornado funnel moves through the southeast Pine Crest Garden section of Xenia, Ohio, Wednesday was April 3, 1974. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo/Fred Stewart, file)
FILE - Cars and debris is strewn over Xenia, Ohio after a tornado ripped through the area on April 4, 1974. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo)
FILE - Tornado destruction in Xenia, Ohio is shown in an April 4, 1974 photo. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo, file)
FILE Homes and businesses are demolished after tornadoes hit Xenia Ohio late Wednesday, April 4,1974. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo, file)
FILE - Mike Muney, 7, sweeps off the slab of a neighbor's house that was demolished by the early April 1974 storm in Xenia, Ohio, April 19, 1974. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo, file)
FILE - This is a section of Xenia Ohio on April 5, 1974. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo)
FILE - Xenia, Ohio, appears in this aerial photo of April 18, 1974, following the tornado of April 3. The section is known as the Arrowhead area of Xenia: where the tornado first touched down. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo/Steve Pyle)
FILE - Sen. Robert Taft talks with people in the tornado ravaged area of Xenia, Ohio in this April 5, 1974 photo. The deadly tornado killed 32 people, injured hundreds and leveled half the city of 25,000. Nearby Wilberforce was also hit hard. As the Watergate scandal unfolded in Washington, President Richard Nixon made an unannounced visit to Xenia to tour the damage. Xenia's was the deadliest and most powerful tornado of the 1974 Super Outbreak. (AP Photo, file)