The top of the world is getting more crowded—last spring, 94 teams visited base camp, and 535 climbers reached the summit. Rescue operations are getting more sophisticated, too, with high-altitude helicopters and, starting this year, a team of Sherpa rangers. Here's a look at where things go wrong and the support systems in place when they do.
BASE stands for “buildings, antennae, spans, and earth,” and jumpers parachute from these and other fixed objects—an incredibly risky pursuit that has claimed at least 180 lives since 1981. The world’s deadliest sport has no governing body, but the online magazine Blinc maintains the official BASE jumping fatality list (BFL), which assigns each dead jumper a B