Mount Everest's filthy base camp conditions, thick traffic jams in the spotlight as two climbers are believed to be dead

Climbers have to navigate thick traffic jams, a filthy, sprawling base camp -- and increasingly, death -- while trying to get to the world's highest Instagram hot spot.

Hundreds of climbers attempt to summit Mt. Everest each year, but with only narrow windows of opportunity to avoid dangerous winds and weather, it leads to long lines awaiting turns.