Six hundred and fifty seconds later, the ice asteroid hit atmosphere. We were out of time. If the berg was left to itself, it would skip through the upper atmosphere and sail on into the sunset. Quite literally. Instead, I activated a number of explosive devices, and the iceberg fractured into a huge number of chunks, small enough to be melted before they made it through the layer of atmosphere. As the air dragged at them, they separated into diverging trajectories. They would all melt at high altitude, and fall to the ground as rain over the next several days to weeks.