Each little tennis ball sized shell is the equivalent of one huge burst in an evening sky. Ken Julian, owner, keeps these in tightly locked boxcars so they're not exposed to extreme temperatures, moisture, or woodland critters. (John Moe)

The Sweat Behind the Fireworks

Each little tennis ball sized shell is the equivalent of one huge burst in an evening sky. Ken Julian, owner, keeps these in tightly locked boxcars so they're not exposed to extreme temperatures, moisture, or woodland critters.

Credit: John Moe