The NFL season just began recently, but already numerous players have received concussions. New research also tends to show that the seriousness of concussions is worse than previously thought - a study showed that almost all the deceased football players studied showed evidence of chronic traumatic encephalopathy (CTE) in the brain. CTE is a degenerative disease caused by repetitive brain trauma. The NFL contends that concussion rates are down and they are putting in place new measures to try to protect players, including helmet testing, changing the type of allowed tackling style, and medical timeouts starting this year. These new measures are likely in response to the NFL's settlement payout of $1 billion to 5,000 former players who claimed serious brain damage from concussions and that the NFL hid the risks of concussions. Frontline is reporting concussions as they occur in a project intended to document and bring attention to the seriousness of professional athletes sustaining concussions and the NFL's denial of the necessity of addressing the problem.