Earlier this month was United States Independence day which means lots and lots of fireworks. For the rest of us who are fireworks-challenged, photographer Andrew Waits provides some insights on how those flowers of fire are built.

Seattle-based Andrew created Boom City – a photo series of cross-sectioned fireworks showing their interiors against a black background.

For me it was a surprise that most of those crackers were actually quite simple – a fuse, a charge and some powder.

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