Military search and rescue efforts in deadly arctic conditions rely on a specialized helicopter with unrivaled power and endurance, and special access reveals how it works; in the Alps, a monster snow blower keeps trains running in dangerous weather.

A helicopter tailor-made for extreme environments aids US Army rescue efforts in some of the most harsh conditions, and a trio of small but mighty tugboats move cargo vessels through the busiest port of Alaska, proving that size doesn't dictate power.