Go behind the scenes at Moscow's Circus School and experience the magic and wonder of the performances that delight millions. See lion tamers risk life and limb, trapeze artists glide through the air, of course, the beloved clowns who inspire imagination and fantasy. With laughter as their language, the Soviet Circus bridges the gap between generations, borders, and all peoples of the world.

Few non-Muslims have glimpsed its sacred glories. All Muslims are drawn by its holy summons. Now, travel to Islam's most revered city to experience a spiritual phenomenon that has endured for more than fourteen centuries INSIDE MECCA. Witness the personal challenges and spiritual rewards of three pilgrims as they join some two million fellow Muslims on their hajj or sacred journey to Mecca. Explore key Islamic sites and ancient rituals that only a handful of non-Muslims have witnessed. Discover the spiritually charged history of Mecca and its place at the center of the fastest growing and perhaps most misunderstood religion in the world.

For 24 years, Saddam Hussein and his Baath Party executed political rivals, Shias, Kurds and anyone else who dared disagree - or even tell a joke about the dictator. A chorus of testimonials, unearthed mass graves and discovered documents now reveal the extent to which Saddam and his Baath Party tortured, maimed, raped and murdered Iraqi citizens. As he faces trial for his crimes, National Geographic goes inside his reign of terror - with rare videotape that shows Baath Party members carrying out Saddam's brutal laws.

As world famous aviator Amelia Earhart closed in on her record-setting attempt to fly around the world in July 1937, she disappeared somewhere over the Pacific Ocean-vanishing without a trace. Did she run out of fuel and crash into the sea? Or could she have survived? Investigators have built the case that Amelia Earhart was a pawn in an espionage plot for President Franklin D. Roosevelt, while eyewitnesses testified that she was captured by the Japanese military. Examining facts and evidence, National Geographic explores one of the most fiercely debated mysteries of all time.

AirVenture Oshkosh is the largest air show on the planet, with more than 10,000 aircraft and more than half a million people. Viewers get an insider's perspective when National Geographic flies along with the world's best aerobatic pilots as they twist and tumble through the sky, and follow a father and son crew as they fly their restored P-51 Mustang on its maiden voyage to Oshkosh after a 14-year restoration - and compete for best in show. But with unparalleled preparation and precaution two things could destroy this event - bad weather and bad luck.

As the saying goes, nothing is certain in life but death and taxes. But how well do you really know the agency that collects your federal taxes - the Internal Revenue Service (IRS)? Most of us only hear from the IRS twice a year - when we get our tax forms and when we get our refund. But what about sides of the IRS you've never seen? Take a look inside IRS processing facilities. Join special agents as they learn interrogation techniques that help them catch the tax cheats. And learn how it turns out when someone challenges the idea that we owe income taxes at all. Experience the challenge of collecting trillions in taxes from hundreds of millions of taxpayers... Inside the IRS.