want to go to tony perkins now. >> reporter: once the fear subsided, the humiliation rushed in.n national television. i didn't know it at the time, but what happened next would change my life forever. >> and, dan, this is such a gripping book. i read it basically in one sitting. it's so well-done. but that moment right there for you, a low point. you're actually remarkably controlled given what was happening inside your head. you had realized that you'd become something of an adrenaline junkie. >> yes, yes, i think it all stems from something a lot of americans can relate to. it all stems from, really, a desire to be great at my job. when i got to abc in my late 20s, you were here at that time. i was green and i knew it and i was insecure about it and my solution was to become a workaholic. and after 9/11, i volunteered to go overseas and cover wars for many, many years. and when i finally came home and slowed down, you can see me from my early days where i looked barely postpubescent. and when i came home and slowed down, i crashed and burned and got depressed and i did a very