text:  A failed dam demolishes a Minnesota family's home. Jenny Barnes and her family watched as their home collapsed Tuesday into the Blue Earth River near Mankato, Minnesota. The family says on Facebook that it doesn't know what will happen, but that its nearby store, the Rapidan Dam Store, that sells burgers and homemade pies, will reopen when it's safe to do so. Officials say they're concerned about the integrity of a nearby bridge over the