Learn how children's brains are affected differently by hits to the head that routinely occur during football practice and game play in this video from FRONTLINE: League of Denial. This video is also featured in the interactive lesson Is Football Safe for Kids? Use the lesson to learn more about the hypothesis that "just playing the game" places young football players at risk of chronic traumatic encephalopathy, or CTE. For background on CTE, watch Introduction To CTE and review How CTE Affects the Brain. This resource is part of the FRONTLINE Collection.