National Geographic : 1941 Apr
© Meerkamper from Monkemeyer Weapons of War Save Skiers' Lives Overhanging masses of snow on the ridges above Parsenn, near Davos, Switzerland, which might cause avalanches dangerous to skiers, are blasted down with projectiles shot from small mortars. Snow sometimes is brought down by explosives placed in boreholes. Starting an Artificial Avalanche-for Safety Snow loosened by explosives isstarted sliding downward byamountaineer with a shovel on the crest ofaridge above Parsenn. Arope prevents him from becoming part of the avalanche. Thus snow iscleared from theheights to protect skiers below.