A vehicle is covered in tornado debris in Dallas, Texas Wednesday, April 4, 2012. Storm surveyors are fanning across North Texas Wednesday trying to determine how many tornadoes touched down in the region Tuesday, as people sift through the debris that used to be their homes. The National Weather Service says possibly as many as a dozen twisters moved across the Dallas-Fort Worth area, bouncing in and out of neighborhoods, destroying homes at random. (AP Photo/Robert Ray)