National Geographic HD The U.S. Government's secret Pentagon program on UFOs is exposed. 2026-08-18 Project Blue Book is launched to study the country's growing UFO problem. 2026-08-18 U.S. nuclear missiles malfunction after a close encounter with UFOs. 2026-08-18 More military and commercial pilots are reporting seeing UAPs in flight. 2026-08-18 Area 51, shrouded in secrecy for decades, is the focus of many UFO rumors. 2026-08-18 The history of the base's development, up-to-date information and expert interviews. 2026-08-18 Considering the line of succession in North Korea. 2026-08-18 The story of the Korean Peninsula and the effort to find lasting peace as told by the people who have tried. 2026-08-18 North Korea embraces cyber-crime for profit and disruption with a 6,000 strong army of cyber criminals worldwide. 2026-08-18 North Korea is a James Bond villain in the form of a brutal dictatorship, self-isolated from the global community as they pick its pockets. 2026-08-18 Regain independence and enjoy greater mobility with the compact design and long-lasting battery of portable oxygen. 2026-08-18 Celebrate America's 250th with the 2026-W Enhanced Uncirculated Silver Eagle, featuring a dual date, Liberty Bell "250" privy, perfect NGC MS70 grade and a limited U.S. Mint mintage of only 125,000. 2026-08-18 Trusted brand Jacuzzi Bath Remodel and interior designer Christina Hall share their secrets on how you can easily and affordably transform your bathroom into a gorgeous custom, safe, stylish space in 1 day! Call for a FREE quote & installation. 2026-08-18 Paid programming. 2026-08-18 Paid programming. 2026-08-18 Transform your bath affordably in just one day! 2026-08-18 Hawai'i Volcanoes National Park is a sacred land born of fire and sea, home to a unique assemblage of species anywhere on the planet. 2026-08-18 A hidden gem full of secrets and surprises, tucked away in a corner of Minnesota; experience its wildlife and stunning beauty from the icy grips of winter to the height of summer blooms. 2026-08-18 Biscayne National Park -- an ocean paradise protecting us from the storm. 2026-08-18 From snaking rivers to windswept mountains, explore the iconic, wild wonder of the West. 2026-08-18 A look at Channel Islands' unique landscapes and wildlife, revealing an older version of California. 2026-08-18 Draining the oceans reveals wrecks awaiting treasure hunters. 2026-08-18 Malaysia Airlines Flight 370 goes missing, resulting in the longest, most costly search in aviation history. 2026-08-18 The secrets of lost ancient civilizations come to light when the Mediterranean is drained. 2026-08-18 The China seas are the most fiercely contested and mysterious waters on the planet. 2026-08-18 Of all the wrecks lying at the bottom of the Baltic, perhaps the most spectacular is the battleship the Mars; only recently discovered, she is finally ready to give up her secrets. 2026-08-18 An attack on a small religious community on the holy island of Lindisfarne in A.D. 793 heralded the start of the Viking age of conquest and expansion; the Vikings' beginnings in Scandinavia. 2026-08-18 The Siege of York occurred from 866 when the Great Heathen army laid claim to the Northumbrian capital of York; looking at the major battles, players and strongholds in ninth-century England. 2026-08-19 The Silk Road opened up a world of trade for the Scandinavians in the East; seeking further wealth, the Vikings known in the East as "the Rus" attacked Constantinople in 860. 2026-08-19 The siege of Paris in 885 was the culmination of the Viking invasions of Francia; looking at the persistent Viking attacks on Francia and the enduring presence of the Scandinavians on the Frankish Empire and beyond. 2026-08-19 Political turmoil in Norway leads a voyage of discovery west. The Vikings discover Iceland where they established lasting settlement. Further exploration from Iceland leads to the discovery of Greenland and to the shores of Newfoundland, making them the first Europeans to discover America. 2026-08-19 The mid-10th-century reign of Harald Bluetooth as king of a newly unified, powerful and Christianized Denmark marked the beginning of a second Viking age. But the reign was not to last with the Normans finally winning the English Kingdom in 1066. We look at the final days of the Viking empire. 2026-08-19