Phoenix, Arizona is the de facto wholesale drug capital of America.

Music and drugs go hand in hand in Nashville.

All the latest research says that your brain needs exercise to stay youthful and fit. Wonder junkie Jason Silva and deception specialist Apollo Robbins are going to put your brain to the test with a serious workout.

Perched 4,000 feet above the Colorado River on the very edge of the Grand Canyon is one of the most recent and innovative engineering marvels of our time. The Grand Canyon Skywalk, opened to the public in March 2007, is an engineering masterpiece united with natural wonder. It is the first ever cantilever designed glass bridge. Constructed in a horseshoe shape, visitors are given the chance to walk out over the edge of the canyon and look straight down. It\'s about 4,000 feet above the canyon, which is higher than any of the world\'s largest buildings and extends 70 feet from the edge. Take a closer look at the Skywalk\'s design, construction and the people that made it a reality.

Located near Johannesburg, South Africa, the Tau Tona is a gold mine. The Tau Tona is the main economic life blood of Johannesburg, supplying half the world’s gold needs. It is the deepest and largest working mine in the world. Its main shaft is 3.6 km deep and consists of 800 km of tunneling. This episode gives viewers a tour of the dynamic systems involved in maintaining a working environment deep in the earth. It also provides a glimpse of what life as a mine worker is like in Tau Tona. Risking heat exhaustion, and with 10 earthquakes a day, the miners work through narrow tunnels to extract gold from a 25 cm thick gold vein.

Megastructure looks at how one of Dubai\'s greatest engineering marvel came to be. Examining the Palm-Jumeira Island from it\'s design to it\'s method of construction, the documentary also lists the problems faced in it\'s construction. Like the effects from the September 11 fears to corrosions and weather.

Uncovering the secrets behind the engineering and designs of the supertankers in one of the largest shipyards in the world. And discovering the technology, power and science of these lords of the oceans.

Perched 4,000 feet above the Colorado River on the very edge of the Grand Canyon is one of the most recent and innovative engineering marvels of our time. The Grand Canyon Skywalk, opened to the public in March 2007, is an engineering masterpiece united with natural wonder. It is the first ever cantilever designed glass bridge. Constructed in a horseshoe shape, visitors are given the chance to walk out over the edge of the canyon and look straight down. It\'s about 4,000 feet above the canyon, which is higher than any of the world\'s largest buildings and extends 70 feet from the edge. Take a closer look at the Skywalk\'s design, construction and the people that made it a reality.

On a routine stop at the tiny Norwegian island of Stord, Atlantic Airways Flight 670 mysteriously careers off the runway and down an embankment.

Seconds after taking off, TAM Airlines flight 402 slammed into a residential neighbourhood bursting into flames, killing all 95 people on board.

Cameras are taken inside the Pentagon for a rare look at the usual going ons in the Pentagon, and a look at how the important meetings might be conducted. High ranking military officials and politicians also share their feelings about the Pentagon.