Family-owned Pyrotecnico prepares to set off world's largest fireworks display on July Fourth

Pyrotecnico, a fifth-generation family-owned fireworks company, is preparing to set off the world's largest display of fireworks on the Fourth of July for America's 250. NBC News Gary Grumbach reports on the storied history and meticulous preparations of the company. For more context and news coverage of the most important stories of our day, click here: https://www.nbcnews.com

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