A drone uses advanced technology to fly on search and rescue missions.

A drone uses advanced technology to fly on search and rescue missions.

Experts use a cutting-edge, all-terrain engineering marvel to access a perilous job site covered in snow; special insider access reveals how this modern marvel helps get the job done.

Experts use a cutting-edge, all-terrain engineering marvel to access a perilous job site covered in snow; special insider access reveals how this modern marvel helps get the job done.

The Yeti is a custom-made snow-eater that keeps a critical Alaskan airport open for business, and experts reveal how cutting-edge engineering and the latest technology keep this machine running in the toughest conditions.

The Yeti is a custom-made snow-eater that keeps a critical Alaskan airport open for business, and experts reveal how cutting-edge engineering and the latest technology keep this machine running in the toughest conditions.

See how tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers, and how the Twin Otter aircraft drops much needed supplies to isolated villages.

See how tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers, and how the Twin Otter aircraft drops much needed supplies to isolated villages.

A helicopter made for extreme environments aids US Army rescue efforts.

A helicopter made for extreme environments aids US Army rescue efforts.

The world's only actual all-terrain vehicle is an Arctic mega monster that can conquer land, snow, and water in dangerous conditions; elsewhere in avalanche country, only one machine can climb deadly mountains and protect a major highway.

The world's only actual all-terrain vehicle is an Arctic mega monster that can conquer land, snow, and water in dangerous conditions; elsewhere in avalanche country, only one machine can climb deadly mountains and protect a major highway.

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.

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.

When melting ice threatens to flood a town, a 22-ton amphibious mega machine battles the elements to save the day; in the Arctic, the Canadian Air Force relies on a massive transport aircraft to deliver supplies and personnel to far-off places.

When melting ice threatens to flood a town, a 22-ton amphibious mega machine battles the elements to save the day; in the Arctic, the Canadian Air Force relies on a massive transport aircraft to deliver supplies and personnel to far-off places.