Megafactories

Inside Ferrari's closely-guarded factory in Maranello, Italy, you'll see how the newest, most powerful model is created from start to finish, learn its design secrets -- and take a test drive at 200 mph.

The Abrams tank is one of the most powerful land weapons systems in the world. Follow the production of these 70-ton monsters from assembly line to testing, and onto the battlefield.

Harley Davidson is a legendary machine that is a symbol of freedom, adventure and the open road. Go behind the scenes of the 10-acre flagship factory in Kansas City to witness the birth of the latest model, the V-Rod, as it's built from the ground up.

At the Peterbilt factory, workers are busy building Model 387 trucks. Go onto the shop floor to see the 36-tonne giants being put together using over 20,000 parts.

Covering more than 300,000 square meters, the John Deere factory houses more than 2000 employees, 49 robotic welders, eight laser cutters and 14 kilometers of overhead track, all of which help stamp, press, cut and weld 60,000 tons of steel into the John Deere STS Combine a harvesting mega-machine. When the combine has been assembled and is ready for painting, it undergoes a seven-hour process to receive the trademark John Deere green color. When John Deere decides to update its tractors design, the modification is first tested in the factories state-of-the-art virtual reality lab to measure the potential impact to the assembly line process, saving both time and money. With its 21st century technology and human innovation, the John Deere mega factory shows the raw power behind one of agriculture's most vital machines.

An exclusive look inside the General Motors pre-production operations factory, where the Chevy Volt is made, with insight into the design and building of the iconic automobile.