A look at siege machines--a machine that converts energy into mechanical force to go over, under, or through fortified or fixed defenses too strong for conventional force. These engines range from man's first long-range missile weapon, the slingshot, to the laser cannons and satellite-destroying robots of the 21st century. All of these machines are designed to breach barriers--castle walls, entrenched troops, even outer space. When the going gets tough, the tough get siege machines.

To wage war, you must first practice it with force in force combat exercises.

Sign up at the ultimate survival school, where soldiers learn to kill or be killed, and learn how 21st-century warriors are training today for the battlefields of tomorrow. We follow combat training throughout history, reviewing survival skills and psychological tools--from ancient Rome to World Wars One and Two--and learn how modern training is enhanced by advanced technology and computer simulation.

From the earliest bunkers of WWI through the ultra-futuristic ones of tomorrow's wars, we trace the story of defensive fortifications. In the constant struggle to hold off ever more potent forms of attack, bunkers function in a variety of forms. Three mammoth block structures comprise a submarine bunker at Lorient, France, able to house 20 subs. We visit Churchill's Cabinet War Room and Hitler's Berlin bunker, as well as backyard Cold War bunkers and those that protect nuclear weapons themselves.

Centcom" in Doha, Qatar represents everything a modern military command post can be with the most sophisticated military information systems--from video-conferencing to real-time frontline satellite communication. From this forward command in the heart of the Middle East, the U.S. ran the Iraq War. But command posts have not always been so technologically advanced as we see when we delve into the history of military communication--from tattooed messenger to satellite technology.

Made up of soldiers and civilians, scientists and specialists in an enormous variety of fields, the US Army Corps of Engineers was created over 200 years ago by Congressional mandate to respond, in peace and war, to the nation's engineering needs. The world's premier engineering and research and development agency, the Corps has blown up, excavated, grated, dredged, and remolded the shape of our continent as we pushed to expand the nation and harness the forces of nature!

The challenge: Move millions of soldiers and tons of cargo halfway around the world and into the thick of action. How? Use the biggest ships, the widest planes, and the strongest trucks. Today, military planners move men and equipment further and faster than ever. The United States Transportation Command, answering to the Department of Defense, runs military transport like an efficient private shipping and travel agency. From the Civil War to US Transcom, we track the development of military logistics.

In antiquity, a hollow reed served as an underwater link to oxygen. As in days of old, humans still need self-contained breathing equipment for a variety of reasons--food-gathering, commercial, recreational, military, and scientific. Dive with the best as we test scuba diving's past, and look to a future of mechanical gills.

A look at siege machines--a machine that converts energy into mechanical force to go over, under, or through fortified or fixed defenses too strong for conventional force. These engines range from man's first long-range missile weapon, the slingshot, to the laser cannons and satellite-destroying robots of the 21st century. All of these machines are designed to breach barriers--castle walls, entrenched troops, even outer space. When the going gets tough, the tough get siege machines.

To wage war, you must first practice it with force in force combat exercises.

Sign up at the ultimate survival school, where soldiers learn to kill or be killed, and learn how 21st-century warriors are training today for the battlefields of tomorrow. We follow combat training throughout history, reviewing survival skills and psychological tools--from ancient Rome to World Wars One and Two--and learn how modern training is enhanced by advanced technology and computer simulation.

From the earliest bunkers of WWI through the ultra-futuristic ones of tomorrow's wars, we trace the story of defensive fortifications. In the constant struggle to hold off ever more potent forms of attack, bunkers function in a variety of forms. Three mammoth block structures comprise a submarine bunker at Lorient, France, able to house 20 subs. We visit Churchill's Cabinet War Room and Hitler's Berlin bunker, as well as backyard Cold War bunkers and those that protect nuclear weapons themselves.

Centcom" in Doha, Qatar represents everything a modern military command post can be with the most sophisticated military information systems--from video-conferencing to real-time frontline satellite communication. From this forward command in the heart of the Middle East, the U.S. ran the Iraq War. But command posts have not always been so technologically advanced as we see when we delve into the history of military communication--from tattooed messenger to satellite technology.

Made up of soldiers and civilians, scientists and specialists in an enormous variety of fields, the US Army Corps of Engineers was created over 200 years ago by Congressional mandate to respond, in peace and war, to the nation's engineering needs. The world's premier engineering and research and development agency, the Corps has blown up, excavated, grated, dredged, and remolded the shape of our continent as we pushed to expand the nation and harness the forces of nature!

The challenge: Move millions of soldiers and tons of cargo halfway around the world and into the thick of action. How? Use the biggest ships, the widest planes, and the strongest trucks. Today, military planners move men and equipment further and faster than ever. The United States Transportation Command, answering to the Department of Defense, runs military transport like an efficient private shipping and travel agency. From the Civil War to US Transcom, we track the development of military logistics.

In antiquity, a hollow reed served as an underwater link to oxygen. As in days of old, humans still need self-contained breathing equipment for a variety of reasons--food-gathering, commercial, recreational, military, and scientific. Dive with the best as we test scuba diving's past, and look to a future of mechanical gills.

A look at siege machines--a machine that converts energy into mechanical force to go over, under, or through fortified or fixed defenses too strong for conventional force. These engines range from man's first long-range missile weapon, the slingshot, to the laser cannons and satellite-destroying robots of the 21st century. All of these machines are designed to breach barriers--castle walls, entrenched troops, even outer space. When the going gets tough, the tough get siege machines.

To wage war, you must first practice it with force in force combat exercises.

Sign up at the ultimate survival school, where soldiers learn to kill or be killed, and learn how 21st-century warriors are training today for the battlefields of tomorrow. We follow combat training throughout history, reviewing survival skills and psychological tools--from ancient Rome to World Wars One and Two--and learn how modern training is enhanced by advanced technology and computer simulation.

From the earliest bunkers of WWI through the ultra-futuristic ones of tomorrow's wars, we trace the story of defensive fortifications. In the constant struggle to hold off ever more potent forms of attack, bunkers function in a variety of forms. Three mammoth block structures comprise a submarine bunker at Lorient, France, able to house 20 subs. We visit Churchill's Cabinet War Room and Hitler's Berlin bunker, as well as backyard Cold War bunkers and those that protect nuclear weapons themselves.

Centcom" in Doha, Qatar represents everything a modern military command post can be with the most sophisticated military information systems--from video-conferencing to real-time frontline satellite communication. From this forward command in the heart of the Middle East, the U.S. ran the Iraq War. But command posts have not always been so technologically advanced as we see when we delve into the history of military communication--from tattooed messenger to satellite technology.

Made up of soldiers and civilians, scientists and specialists in an enormous variety of fields, the US Army Corps of Engineers was created over 200 years ago by Congressional mandate to respond, in peace and war, to the nation's engineering needs. The world's premier engineering and research and development agency, the Corps has blown up, excavated, grated, dredged, and remolded the shape of our continent as we pushed to expand the nation and harness the forces of nature!

The challenge: Move millions of soldiers and tons of cargo halfway around the world and into the thick of action. How? Use the biggest ships, the widest planes, and the strongest trucks. Today, military planners move men and equipment further and faster than ever. The United States Transportation Command, answering to the Department of Defense, runs military transport like an efficient private shipping and travel agency. From the Civil War to US Transcom, we track the development of military logistics.

In antiquity, a hollow reed served as an underwater link to oxygen. As in days of old, humans still need self-contained breathing equipment for a variety of reasons--food-gathering, commercial, recreational, military, and scientific. Dive with the best as we test scuba diving's past, and look to a future of mechanical gills.