Extreme Machines

See how today's nuclear submarines play an integral role in U.S. national defense.

Documentary looking at some of the most spectacular and dramatic train journeys in the world, including meetings with the engineers, drivers and passengers. The programme explores the historical background of some of the lines, and highlights the incredible engineering feats needed to build them.

The 21st Century promises to offer travellers a wide range of new flying experiences. From giant triple deck super jumbos to supersonic planes and giant airships, flying in this century will continue to be the most fascinating and fastest way to travel the globe. This program looks at the ideas that are still on the drawing boards, such as time-reducing suborbital flights, to aircraft that are ready to roll out of the hanger and fly passengers to exciting new destinations.