One state is "ground zero" for sinkholes There are reasons why the U.S., and one spot in particular, has "sinkholes waiting to happen." VIDEO: http://yhoo.it/1d7rHd5 Is your state in danger? Do you know the warning signs? One state is "ground zero" for sinkholes There are reasons why the U.S., and one spot in particular, has "sinkholes waiting to happen." VIDEO: http://yhoo.it/1d7rHd5 Is your state in danger? Do you know the warning signs?

One state is "ground zero" for sinkholes

There are reasons why the U.S., and one spot in particular, has "sinkholes waiting to happen." VIDEO: http://yhoo.it/1d7rHd5

Is your state in danger? Do you know the warning signs?