Five young men in their early twenties, carrying backpacks and guitars, climbed onto the bus in Mendoza, Argentina, that was to take them over the Andes to Santiago de Chile, where they would play the last show of their South American tour, and then board a plane the day after back to their home country of Germany. In spite of the South American winter, the weather in Mendoza was bright and sunny. The ride was supposed to take six hours, after...