CHICAGO, IL - FEBRUARY 17: A Chicago police car and command van stand in front of the Epitome nightclub February 17, 2003 in Chicago, Illinois. At least 21people died early February 17, 2003 after a security guard allegedly discharged mace or pepper spray to break up a fight, causing a panic and a stampede for the exits. At least 30 people are reportedly hospitalised. (Photo by Allen Kaleta/Getty Images)

People are shown trying to exit the Epitome Nightclub in Chicago as emergency rescue workers look on from the street in this image from television taken on Monday, Feb. 17, 2003. Hundreds of screaming guests rushed the exits of the crowded nightclub early Monday morning after someone used pepper spray or Mace. At least 21 people were crushed to death or smothered in the panic, officials said. (AP Photo/Ken Herzlich)

Lollapalooza fans evacuate Grant Park Saturday afternoon as a major storm approaches Chicago. August 4, 2012. I Scott Stewart~Sun-Times