WASHINGTON — The Davidson family hid under a utility sink in their basement, bracing for the raw blast of a tornado.First came a terrific noise, then a painful rain — of concrete. The twister ripped foundation blocks from the walls, burying and bloodying the quartet. Dazed, they dug out and straggled outside, only to find their entire neighborhood had been knocked down."It was totally crazy," said Joey Davidson, 38, from his bed at UnityPoint [...]