Nate Getz:  He signed up for the Marines the day he turned _ 18 _ . The military gave him the family , the structure that he never had . The only other choice would have been a gang .
Special Agent Sam Hanna: Why 'd he pick one over the other ?
Special Agent G. Callen: Chance to get away from it all . Gangs give you structure , but they keep you in the same place . Military 's all about starting over .
Nate Getz: Unless you start to repeat your behavior .