Important questions are being raised about 9/11 as evidence surfaces in a lawsuit against the Saudi government filed by families of the people killed in the 2001 terrorist attacks.
Former National Institutes of Health Director Dr. Francis Collins, who abruptly left his NIH research lab in February, fears aggressive downsizing could impact Americans’ health.
The wife of a fertility doctor is found dead at the bottom of a staircase. Did her dogs play a role in her death or was the scene staged to cover a murder? "48 Hours" correspondent Tracy Smith reports.
