October 28, 2006 Hour 2: A couple of big studies this week report that CT scans can literally save lives

A couple of big studies this week report that CT scans can literally save the lives of smokers and former smokers. We also talk colds.  A new study reports that the common cold may contribute to memory loss in later years.  Also, new research reinforces how exercise can reduce our risk of catching a cold, can help us quit smoking, and recover from heart surgery. Dr. Cooper takes calls.