NBC Nightly News with Brian Williams—August 8, 2013
The number of total knee replacements is double the combined number of wrist, ankle, shoulder and hip replacements. NBC's Dr. Nancy Snyderman reports.
Last week "Nightly News" aired the first report in our three-part series about knee replacement in light of Brian Williams' knee operation.
Watch an extended interview with Dr. Russell Windsor of Hospital for Special Surgery at nbcnews.com.
This segment originally appeared at nbcnews.com.