Violence comes along with the sports. Torn ligaments and broken bones are a risk, but an even greater risk is concussions. Concussions from sports is considered an epidemic in America, according to the Centers for Disease Control. There are three million sports related concussions that occur every year in this country. New research shows that these concussions can cause permanent brain damage, dementia, and depression. Many NFL players have had career ending concussions, including Steve Young, Troy Aikman, and Ted Johnson. Johnson has so much power that he once broke another players’ helmet in two. By his own estimate, he has had more than 50 concussions, but kept on playing despite vision and memory problems and claims to have not known any better, suggesting lack of education in the NFL. Johnson later suffered from depression and had trouble staying out of bed, which lasted for a year and a half. Dr. Robert Cantu, who treated Johnson says that Johnson is suffering from brain damage. Walter Hilgenberg, a former Minnesota Viking also suffered severely and died from Lou Gehring’s disease at age 66 before his wife donated his brain to research because of his concussions. Dr. McKee says that cross sections of him brain show that Hilgenberg was suffereing from a degenerative brain disease, called chronic traumatic encephalopathy, or CTE. Dr. Mckee has also examined 16 brains from former athletes, all suffering from the same disease. CTE progresses undetected for year and destroys brain cells in silence and eventually causing dementia and other cognitive problems.