The U.S. Navy's brand-new Ford-class aircraft carrier is the world's largest warship, and using the latest naval and aeronautic technology, engineers and military personnel race to build and test this cutting-edge vessel.

To build the Qinghai-Tibet Railway, the world's highest railway, engineers braved a deadly Himalayan environment and its -40-degree temperatures. The cutting-edge $4 billion train system they built connects Lhasa, one of the planet's most inaccessible cities, to a world beyond the ice.