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United States, 2013
Switzerland, 2005
United States, 2013
Switzerland, 2007
Switzerland, 2015
Switzerland, 2007
Algeria, 2005
Switzerland, 2014
Switzerland, 2016
United States, 2013
Switzerland, 2014
Switzerland ,2016
Switzerland, 2013
Switzerland, 2013
Himalaya Pangboche, Nepal, 2007
Himalaya, Nepal, 2007
Himalaya Gorak Shep, Nepal, 2007
Switzerland, 2006
United States, 2013
Switzerland, 2005
United States, 2013
Switzerland, 2007
Switzerland, 2015
Switzerland, 2007
Algeria, 2005
Switzerland, 2014
Switzerland, 2016
United States, 2013
Switzerland, 2014
Switzerland ,2016
Switzerland, 2013
Switzerland, 2013
Himalaya Pangboche, Nepal, 2007
Himalaya, Nepal, 2007
Himalaya Gorak Shep, Nepal, 2007