Fireworks always getting fancier

Funeral Fireworks
Fireworks.
Fireworks

July 4 fireworks displays will be held all over the state of Minnesota, and they seem to get more elaborate every year.

MPR's Cathy Wurzer talked with Dr. John Conkling, an adjunct professor of chemistry at Washington College in Maryland and the retired technical director of the American Pyrotechnics Association, about the newest trends in fireworks.