With hundreds of climbers reportedly trapped by a shock blizzard on Mount Everest right now, the mountain is once again showing its brutal power. But the weather is just one enemy. Even on a clear day, the extreme altitude wages a silent war on the human body, causing deadly swelling in the brain and lungs. This story from our 2013 archives goes inside 'Everest ER' — the tiny tent where doctors fight to save those who fall victim to the mountain. Watch the full story: https://youtu.be/VPqI8NsF9F