America protects its homeland with the most technologically advanced military force ever conceived.

Traces the origins of this tasty drink from Ethiopia over 1,000 years ago to the espresso-fueled explosion of specialty coffee stores like Starbucks today.

The sugar industry came of age on the backs of those enslaved and toiling in Caribbean fields, and British desire to control production of sugar and its byproduct, rum. Sugar also played a surprisingly critical part in America's battle for independence.

Nearly 500 years after his death, Leonardo da Vinci still intrigues us. Most people think of him as a great artist, but he was also a remarkable scientist and inventor.