mountain climbing

Everest deaths: 'Corners are being massively cut'

An experienced mountaineer, Adrian Ballinger knows about the dangers of Everest better than most. He's spent 12 seasons as a guide on the world's highest peak and has summited it eight times -- once without supplementary oxygen, which almost cost him his life.

What it's really like to tackle Everest's deadly peak

"Happy anniversary, my love. I can't wait to see you again," 34-year-old Ian Stewart told his wife, Katie, as they said their goodbyes at Mount Everest base camp. "I promise I will come back home, that I won't prioritize the summit over my safety."