Helena, Montana: A Historic Shift from Riches

At the turn of the century, Helena, Montana, was the richest city in the world, making more millionaires quickly than anywhere else. Now, it's just an ordinary town with some rich people, but not like before. The city has gone from a booming hotspot to a normal community. What can we learn from Helena's big economic change, and what does it say about the bigger changes in our society?