As the temperature drops, the people of Riobamba, Ecuador, raise the heat with their annual games of pyrotechnics. Bundled up against the cold, they huddle together, their breaths visible in the frigid night air. Then, the first explosion lights up the sky, casting long, dramatic shadows on the ancient stone buildings. The show continues, each burst of light revealing excited faces, some gasping, others cheering, united in their awe of the fireworks' dance against the dark, chilly night.