The H.M.S. Unseen is one of the most efficient, lethal submarines ever built. But suddenly, on a training mission off the English coast, it vanishes, baffling military intelligence on both...

Saudi Arabia, the world's leading producer of oil, is on the brink of revolution.

Inside the opulent palaces and lavish mansions, the royal family is ransacking the country's dwindling...

It's one of the stealthiest, most dangerous underwater warships ever built.and it's about to set off World War III.

Silent at less than five knots and capable of a massive nuclear warhead punch,...

Amid the Canary Islands lies the massive crater of thevolcano Cumbre Vieja. Scientists theorize that one day the volcano will erupt, triggering a series of events that will lead to a tsunami...