making a call to williams. >> she would have gone a couple more days with excruciating thoughts of, is her family home still there? and we were able to answer that question for her. >> reporter: williams and her husband are heartbroken for the neighbors that lost everything, but they're also grateful forhe volunteers who never gave up. >> it's just unbelievable that there are people in this world that will do that, for free! >> when they were tired, they just kept going. >> reporter: the williams plan to have the volunteers back to their house to thank them personally. >> these people are miracle workers. >> reporter: they are among the hundreds of men and women who charged up the smokey mountains, determined to save who and what they could. paolo sandoval, cnn, gatlinburg, tennessee. >> thanks to paolo for that. well, december 14th will mark four years since a gunman murdered the 20 first graders and six adults at sandy hook elementary school in newtown,