From the unimaginable power of nuclear bombs to microscopic anthrax spores, we reveal who possesses these nightmare weapons and explore the danger posed by terrorists with deadly technologies. Using the latest computer technology we see an on-screen representation of the radioactive plume that would result from a mock dirty bomb attack in Seattle. We will learn how bio-agents are discovered and understand the technology currently used to identify and prevent suicide bombings. Weapons of mass destruction have made the world a dangerous place but we will find out how technology can assist us as we strive for lasting solutions.

Doomsday threats range from nuclear arsenals to global warming to nanotechnology, cyborgs, and robots.                                                 

The second deadly hour examines more threats--both natural and manmade--that may endanger civilization. From the far reaches of space to tiny viruses, doomsday sources are many. But so are technologies used to keep doomsday at bay. Asteroids of significant size have hit our planet before and likely will again. Asteroid hunters demonstrate the Near Earth Asteroid Tracking (NEAT) program and methods being developed to destroy earth-aimed asteroids. Then, it's onto bioterrorism's sinister technologies--how highly virulent agents like smallpox and plague can be weaponized. Next, an ex-hacker turned cyber-security expert shows how vulnerable the nation's computers are to cyberterror. Finally, we visit the controversial world of biotechnology. Could genetically engineered crops backfire? Does a brave new world of genetically selected beings loom in our not-so-distant future?

Nuclear research ranges from well-known applications, such as bombs and reactors, to little-known uses in medicine, food preparation, and radiation detection. It's also spawned ancillary technologies to store nuclear waste and clean up accidents. Despite the risk of use and abuse for destructive purposes, many scientists remain optimistic about what's next for the atom. In an explosive hour, we explore the atom in war and peace, and the latest in nuclear power generation, safety, and security.

The most priceless jewels in the arsenals of a handful of countries, some nuclear submarines carry more firepower than all the bombs dropped in history. Since the 1950s, these lethal steel sharks have been a cornerstone of U.S. defense policy. The Cold War launched an underwater race for supremacy with the Soviet Union. The result: engineering miracles, which roam 70% of the earth's surface, providing deterrence to enemies, intelligence about adversaries, and an abiding sense of dread.

Arising from the horrible carnage, deprivation, and suffering caused by war is a countless array of everyday items--from hairbrushes to microwaves--that directly descend from wartime innovations. Wartime research and development have revolutionized communication, transportation, and medicine. From Spam to nuclear power to hairspray and cell phones, life as we know it ironically owes a lot to war. We'll follow the day-to-day life of an ordinary woman and see the influence of war on her life.

Tiny" weapons may not sound impressive...but small can kill, and it can also be easily concealed. From a pocket pistol used by the police...to a submachine gun wielded by a bodyguard...to a carbine in the hands of an Army Ranger, many of today's most effective weapons are smaller than ever. They can fit in your pocket, fly through the air, even break through walls--tiny weapons are an essential part of battle, self-defense, and spreading terror.

Where can you fire a missile without scaring the neighbors? Or lift millions of pounds in pursuit of a couple of ounces of gold? On a proving ground, of course, where performance is the only thing that matters. Because in the heat of battle or head-to-head competition, no excuses can be given. We'll visit the US military's Cold Regions Testing Center in Alaska and desert proving grounds in Arizona, the Olympic Complex in Colorado, and the now-defunct Packard proving grounds in Michigan.