through. >> i felt the shaking of the house next thing i knew the tub had lifted and it was out of my hands. i couldn't hold on. >> incredibly, they survived as places like mayfield begin their cleanup efforts, support is pouring in from across the country. including one city that knows what lies ahead all too well in 2007, an ef-5 tornado shredded 95% of greensburg, kansas. including the home of peter and haley marks. >> probably for the next six months, we were kind of just operating in shock. >> reporter: dennis mckinney is a former state representative who live on the air described losing his home. >> the roof started going off, so i ran down the stairs. >> now 14 years later. >> the tornado is a great leveller it doesn't matter what your social status is. >> reporter: with greensburg a blank slate, they decided to build back green. all of the city's electricity now comes from this wind farm. >> we made the commitment that 100%