Around 100 climbers , including Westerners , had already passed through the Khumbu Icefall .
Around 100 climbers , including Westerners , had already gathered at the base camp ahead of their attempt to scale the mountain when the avalanche happened .
Around 100 climbers , including Westerners , had already passed through the Khumbu Icefall and gathered at the base camp ahead of their attempt to scale the mountain when the avalanche happened .