NEOSHO, MO- JUNE 17:  John Thurston constructs the door of a safe room at Twister Safe, a small family business that specializes in the construction of safe rooms June 17, 2011 in Neosho, Missouri. A surge of interest in safe rooms has been seen since an F5 tornado tore through Joplin, Missouri in May.  (Photo by Julie Denesha/Getty Images)