Three of the world's most elite climbers are missing and presumed dead by park officials after an avalanche in Alberta, Canada. Jess Roskelley, a U.S. citizen, and David Lama and Hansjörg Auer, who are both Austrian, had been attempting to climb the east face of Howse Peak in Banff National Park. They were reported overdue on Wednesday, according to the park. "Based on an assessment of the scene, all three members of the party are presumed to be deceased," the park said. A statement from Parks Canada said that responders "observed signs of multiple avalanches and debris containing climbing equipment."...