Wires send signals to fire off show

July 4, 2013 | 5:18 p.m. CDT
Susan Fields plugs wires into a rail for Columbia’s 61st Annual Fourth of July Fire in the Sky event. The display is programed into a computer then uploaded to a specialized control unit that sends signals to fire the cakes, comets and mines attached to them.

RELATED STORIES: What you need to know about tonight's fireworks show downtown