CBS Evening News | The ground beneath the town of Azle, Texas, has shaken more than 30 times since last November. Residents dealing with the damage caused to their homes are demanding answers to questions about the effects of oil and gas drilling

The ground beneath the town of Azle, Texas, has shaken more than 30 times since last November. Residents dealing with the damage caused to their homes are demanding answers to questions about the effects of oil and gas drilling, the suspected cause of the quakes. Manuel Bojorquez reports. Air Date: Jan 11, 2014