July Fourth fireworks light up skies across US

Exclusive behind-the-scenes look at SF's July 4th fireworks preps

Lightning strikes during US 250th anniversary fireworks

Fireworks lit up the roadside after a truck carrying pyrotechnics caught fire on Interstate 75 in Tennessee, stopping traffic in both directions while crews extinguished the flames. No injuries were reported, according to the Chattanooga Fire Department.

A truck carrying fireworks exploded on a Tennessee highway after a fire started in the trailer.

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