The firework shell weighed almost 2,800 pounds, about the weight of a Toyota Corolla.
The firework shell weighed almost 2,800 pounds, about the weight of a Toyota Corolla, and was 62 inches -- a little more than five feet -- in diameter.A team at Steamboat Fireworks launched the shell from a 26-foot steel tube buried in Emerald Mountain, which overlooks the festival. Explosives propelled the shell out of the tube at 300 mph, and it rose nearly a mile in the air before exploding.
Borden told CNN that his team has been working to break the record for seven years and spent thousands of hours building progressively larger fireworks.The team tried to break the record last year, but the shell exploded too early."When you think of it on the physics level, to get a ton of anything up in the air with one explosion takes quite a bit of thinking," Borden said.
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