have bettero research, better data, better , wepment, better protocols need more athletes to understand how important it is to do what we can to prevent injuries and admit them when they happen. we have to change the culture. charlie: thank you, mr. president. we will continue the exploration and time. tell me what we are going to do? >> we spoke about sports trauma. we are going to talk about the thatological consequences produce serious damage to the brain. by parentstreatment or children and aspects of inheritance that have psychological brain consequences that are quite frightening. will speak about the psychological parallels to physical trauma. for beinghank you here. we will see you for the next episode. see you then. >> i am mark halperin. >> i am john heilemann. with all due respect mark zuckerberg, if you are looking for someone to give away billions to, we have always liked you. ♪ mark: this looks like a battery gummy bear. john: happy national pie day. in our curriculum tonight's psychology with donald trump,