Authorities say an avalanche near Lake Tahoe has killed eight backcountry skiers, and one person remains missing. The slide occurred Tuesday in Northern California’s Sierra Nevada mountains. It is one of the deadliest avalanches in U.S. history. Others include a 1910 avalanche in Washington that swept two trains into a gorge, killing 96 people. Around 65 people were killed by an 1898 avalanche during the Klondike Gold Rush. In 1981, 10 climbers and a guide were killed by a massive ice avalanche on Mount Rainier in the nation's deadliest mountaineering accident.
