kaitlin flannagan spent a year investigating, the dark power of fraternities was published in the atlantic. kaitlin, you say there's evidence of the volume of sex crimes in universities in the claims made against them. >> we do know that of all kinds of insurance claims made against fraternities each year, the number 2 kind of claim is for sexual assault, far more than hazing, which we fell was the most important source of injuries at universities. but overwhelming number of students coming forward saying, i was sexually assaulted. >> that rape cultural has actually been established within the greek system? >> you know, when you go on, you don't have these kinds of problems. but every single campus in america that has a greek system has at least one fraternity house about which everyone on campus, right up to the president of the university or college knows is a really bad operator. and on that kind of a chapter you absolutely have what unambiguously planned parties and events women have actual sexual acts committed against them. the very slow process by which universities and national org