In this Wednesday, June 25, 2014, file photo, former NFL football player Kevin Turner, right, who suffers from Lou Gehrig's disease, listens during testimony before the Senate Special Committee on Aging hearing regarding concussions and the long term effects of brain related sports injuries in Washington. The NFL will ask a U.S. appeals court to uphold a potential $1 billion plan to settle thousands of concussion lawsuits filed by former players on Thursday, Nov. 19, 2015. (AP Photo/Charles Dharapak, File)

NFL set to defend $1B concussion settlement amid appeals

The NFL will ask a U.S. appeals court to uphold a potential $1 billion plan to settle thousands of concussion lawsuits filed by former playe…