SAN FRANCISCO (KGO) -- There's a new record for the world's largest aerial firework. It was launched during the finale of the Winter Carnival Night Extravaganza in Steamboat Springs, Colorado, on Feb.

In honor of the Fourth of July, check out the largest firework ever detonated in North America. At more than 1,175 pounds, it may be the heaviest ever set off in the world. The 48-inch shell was ...