Miss O'Leary's cow might be innocent after all: 150th anniversary of the Great Chicago Fire

As the tale goes, Miss O'Leary's cow kicked over a lantern and started the Great Chicago Fire in 1871, burning about 3 square miles of the city, destroying 17,500 buildings and killing around 300 people.

What can firsthand accounts teach us about the fire?

Host Scott Tong speaks with Robert Loerzel, a Chicago-based freelance journalist, about his reporting.