Sarah Mallory Geis, a 39-year-old mountaineer from Texas, was among four climbers killed in an avalanche struck an international expedition on Broad Peak.

Led by a renowned Nepal-born mountaineer, the climbers are missing after an avalanche struck Broad Peak in northern Pakistan, one of the world’s highest mountains.

Two of the dead identified as Oman’s Nadhira Ahmed Abdullah Al Harthy and Nepal’s Pur Bahadur Gurung; missing include renowned Nepalese mountaineer Nirmal Purja, Pakistani climber…