A behind-the-scenes look at fireworks displays and the safety reasons certain shells aren’t used, highlighting careful planning and expert handling.

A fireworks display set off on a road near a Bradford petrol station have been condemned as “dangerous” with “no regard for public safety”.

In the middle of Lake Union sits a grayish barge, framed by Seattle’s skyline and cloudy skies. The vessel’s surface appears unassuming, but on the inside lies almost 11,000 pounds of fireworks.