Nepal is hit by a 6.7 mega-earthquake that kills thousands. Across the country, survivors are hit by terrifying avalanches that destroy everything in their path. We reveal remarkable stories of survival, from the Kathmandu Valley to Mount Everest. We detail the split-second decisions that resulted in life or death, from those who were there and through footage recorded during the tragedy.

On Oct. 1, 2015, the cargo ship El Faro was on its regular run from Jacksonville to Puerto Rico when it disappeared in Hurricane Joaquin, a Category 4 storm. A subsequent investigation determined that El Faro sank off the coast of the Bahamas, and all 33 crew members had been lost. The sinking was the greatest seagoing U.S. merchant marine shipping disaster since World War II.