north georgia. in the foothills of the appalachian mountains. to locals, it's god's country. for david gormley, it's just 15 miles from his childhood home, yet a world away from the life he left behind. >> we went to church twice a week. wednesday nights and sundays and we would be there for six to eight hours. there was always this pressure to assume that there was god, and that if you didn't hear him or if he didn't speak to you, you weren't trying hard enough. >> you never really felt comfortable. >> no. >> david is not alone. today, many young people are doubting their faith and walking away from god. why are millennials now questioning so much? >> i think they're struggling with questions of living with a