o donnell: some of the hardest working people. reporter: and you and i have been lucky to meet a lot of them. david, thank you. one to have the other hardest hit areas is warren county about two and a half hours east of here where at least 15 people were killed there, including 11 people who lived on the same block, and as we mentioned, seven of those victim were children. communities in nearby hop pins county were obliterated including three-quarters of the buildings in the small town of dawson springs. cbs s lilia luciano shows us the devastation. two-month-old oaklyn koon is among the youngest known victims. her grandmother audrey carmen remembers oaklyn as precious. she was the light of their life. my son was so excited to have his little baby girl. reporter: oaklyn s mother posted about their ordeal on facebook, including oaklyn and brothers at the hospital,