Could cameras in operating rooms reduce preventable medical deaths?

Chris Nowakoski's wife died in Wisconsin during what should have been a routine procedure on her pacemaker. Danny Long's wife in North Carolina suffered catastrophic neurological injury during a surgery to relieve numbness in her extremities. A doctor perforated the colon and esophagus of Deirdre Gilbert's daughter in Texas, then operated on her after she was dead. In each case, the families still don't know the full story of what happened to their loved ones because of a lack of documentation and an inability to pursue a costly lawsuit. They are relatives of an estimated 400,000 a year people who die in the United States of preventable medical errors, the third-leading cause of death after heart disease and cancer.