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Sunlight pierced the smudged side window of the Bell UH-1Y helicopter. The pilot steered the aircraft higher until it crested the snow-laden ridge. In the rear section, Dustin Reed squinted against the glare. After staring at computers for ten hours a day, it was no easy task. He had a splitting headache from work, and squinting only made it worse. A moment later, the ridge cut off the glare abruptly, and he got his first good view of the impact site. The crater adorned the north face of the crest. The impact had caused a massive avalanche, and swaths of