"nbc news now" at 9:00 p.m. eastern time. olympic gold medal gymnast marylou retton made headlines in october when she had a near fatal health scare. now she's talking exclusively to "today" in a revealing one-on-one with hoda kotb. >> you have a breathing apparatus, oxygen. >> i'm on oxygen. >> i feel like you're in a very vulnerable state. >> very much so. i'm very private and to come out and talk about it. usually my interviews are, oh, yes, it felt great to win the olympics. >> yeah, that kind of stuff. >> this is serious, and this is life. and i am so grateful to be here. i am blessed to be here because there is a time when they were about to put me on life support. >> don't miss hoda's powerful exclusive interview with marylou retton tomorrow on "today." when we come back, there's