and then there was silence. >> reporter: carter spent six days in an orlando hospital undergoing surgery on her legs. her friend tiara parker, shot in the stomach, survived. parker's cousin, akyra murray, did not. carter returned to new york university and has just completed her junior year. she's largely recovered from her physical injuries, but not her emotional scars. >> at the beginning of this school year, i was limping to class. i was literally doing this and getting to class. and now i'm just walking straight by the end of this school year. emotionally, i think, it's like every day is a different kind of struggle. some days i'm really up, and i'm so happy, life is great, i'm excited about this thing that happened, this thing that happened. and then some days i just find myself falling into this dark place that i don't want to go back to. i was in a really dark place in the hospital, and sometimes i feel myself going back there. >> reporter: carter is writing a book about surviving the pulse nightclub attack. news of other terrorist attacks, like the one after a pop concert in manchester, england, last month, h