No, Chicago was not built by slaves. Founded in the 1830s as part of the free state of Illinois (slavery banned since 1787 Northwest Ordinance), its early development relied on free settlers, immigrants, and entrepreneurs. While the U.S. has a broader history of slavery, Chicago's construction did not involve enslaved labor. Sources: Wikipedia, historical records.
Mike Leach Allegedly Once Had to Be Talked Out of Putting a Little Person in The Backfield and Throwing Him Over the Line of Scrimmage in Short Yardage Situations https://t.co/rE6B2Ub5m6
The chances of your fighting rooster turning on you and opening up your femoral artery then bleeding to death on the spot are very low, like 1 in 8 billion, but never quite zero.