frank wood rushed his mily into the storm shelter as the twister struck. >> we've got to go now! it's coming right over us. we're right in its pat >> one beloved member of the wood family, roxie the dog, didn't make it into the shelter. all these stories and details tonight and witness the courage of people beset by catastrophe and tragedy. but we start at the beginning. it's 5:40 on sunday evening and a monster rakes across joplin, missouri. >> strong tornado! >> as the twist errors towards this convenience store -- >> no, they haven't yet. the sirens aren't going. >> customers huddle in terror inside a dark refrigerated storeroom.