"Within the last year, the world we live in has been changed. It's difficult for us to understand that the way we lived yesterday, and the way we thought yesterday, will no longer do. The dropping of the atomic bomb has brought us, all of us, the beginning of a new day, and we must start thinking in new ways and in broader terms. It is our only chance for survival..."

This is the story of a New York City subway train, traveling under a river, when the power goes off.

**Warning** The program features very graphic descriptions of death and destruction.