On May 4, 2007, the small town of Greensburg, Kansas, was annihilated by an F5 tornado. Almost every building was destroyed leaving the townspeople with the big question?Do we stay or go? Meet them all in this premier episode of Greensburg and hear their first hand accounts of how they survived one of the largest tornadoes in U.S. history. With a clean slate the town decides to rebuild the entire community energy efficient and as green as possible. But not everyone is sold on the idea.