Melting permafrost poses new climate change risk

Barbara Garcia, a survivor of the massive tornado that struck an Oklahoma City suburb, found her dog buried alive under the rubble during her interview with CBS News' Anna Werner.

At least 51 people were killed in the massive tornado that hit Moore, Okla. Anna Werner reports on how it has left residents in a state of shock.

Storm spotter Ben McMillan described to Scott Pelley how the mile-wide tornado that tore through an Oklahoma City suburb was one of the worst he's ever seen.

Several children have been pulled alive from the rubble of an elementary school south of Oklahoma City that was hit by a tornado estimated to be over a mile wide. Scott Pelley reports.

A tornado estimated to be a mile wide has obliterated part of the Oklahoma City metropolitan area. The tornado hit the city of Moore, where two schools were hit, along with a hospital and a movie theater. Anna Werner reports.

Oklahoma City Manager Jim Couch told Scott Pelley that search-and-rescue teams have been dispatched after a tornado estimated to be over a mile wide tore a path through the town of Moore, Okla.