Chances are you have never heard of Mount Olive, a sleepy little town in Macoupin County, in the central part of Illinois. But its cemetery marks the final resting place of a lady who was once called "the most dangerous woman in America". She was born Mary Harris in Cork, Ireland in 1837, and played a prominent role in America's labor movement. A left-leaning magazine still bears her name today. What is she better known as?