A new study found that at least one in four former NFL players may have chronic traumatic encephalopathy, a degenerative brain disease caused by repeated head trauma. The condition has become an increasing concern for athletes, with the NFL saying it is taking steps to protect players. #NFL #CTE #football Get a fast-paced look at the latest from the border to Main Street to the White House on "NewsNation Live" with Nichole Berlie. Weekdays starting at 12p/11C. NewsNation is your source for fact-based, unbiased news for all Americans. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij