reporter: 5-year-old jacob lemay is fierce. he loves karate and dogs and spaceships and playing with his sisters. so two sisters and you re the brother, right? yeah. reporter: were you always the brother? i m not always. reporter: what were you before? i m a sister. reporter: how come it changed? because i wanted to be a boy. reporter: in the beginning the lemays were raising three girls. but when mia was around 2, she started saying, i m a boy. did you think it was a phase? i hoped it was a phase. reporter: mia learned to write her name but would immediately scribble it out jacob still remembers. i didn t like to write that name. i wanted to write j-a-c-o-b. reporter: jacob. j-a-c-o-b, you picked it out, right? you look beautiful reporter: even something as simple as a haircut wasn t.
news, beginning in paris and the planned terror attack foiled in the nick of time. french authorities say the 24-year-old in custody was only caught because he accidentally shot himself in the leg. also the man who shot president reagan and three others could be permanently released from a mental hospital. but is john hinckley jr. no longer a threat? meanwhile, people in baltimore are not giving up their demand for answers to the question of what happened to 25-year-old freddie gray inside a police van. the just department is now also trying to find out. and the controversial and courageous story that we previewed on this very show yesterday about a transgender 5-year-old. reporter: were you always a brother? not always. reporter: what were you before? a sister. reporter: how come it changed? because i wanted to be a boy. jacob s story leads us to our bing pulse question of the day. do you think a preschooler can understand gender identity?