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Jewish World Review How Stuff Works: How President Obama's limousine works By Marshall Brain http://www.JewishWorldReview.com | (MCT) Imagine that you are trying to build a car that will safely carry the president of the United States. In today's world, where assassins or terrorists might try to attack from many different angles, it is a challenging problem. One way to solve the problem might be to modify existing military hardware. For example, you might start with a tank. Tanks have the advantage that they are battle tested. They repel most bombs and bullets. They don't have tires that can go flat. But there are also some problems. Tanks are incredibly heavy and wide compared to a normal car or truck, so they don't fit well on normal roads. They are also pretty intimidating - it would be hard for the president to gracefully arrive at a foreign embassy in a tank. Tanks have no windows. And it is not so easy to get in and out. What the president needs is a car that contains many of the elements of a tank, but still looks like a car for the sake of appearances. That is, essentially, what GM's Cadillac division has done to create Obama's new limousine. The car does look something like a Cadillac because it uses bits and pieces from a real Cadillac. But everything else is custom work, with the intention of creating a rolling fortress. The most obvious thing that people will notice about this limousine is its size. Think about the Hummer H2 for comparison. The H2 is one of the biggest cars on the road today. Obama's car will be a foot longer. When Obama stands next to his limousine, it will be almost as tall as he is. This means that the president's limousine makes for a big target. How might a terrorist try to attack this target? One way would be to shoot at the car with bullets or armor piercing shells. That won't work. The bodywork is reinforced with steel and titanium to create bullet-proof protection. Shooting at the windows won't work either, since they are 5 inches thick and bullet proof as well. Another line of attack would be to try to shred the tires and disable the car. However, the tires are built to withstand almost anything. And even if the rubber is completely destroyed, there are solid "tires" attached to the rims that will allow the car to get away. The ride will be a little harsh, but the car will still go. What if the assassin tries to plant a bomb or a mine on the road? Five inches of steel plating underneath the car will deflect the blast. The engine and radiator are protected against bullets and blasts as well. What about some kind of chemical attack? Tanks face this same threat on a battlefield, so the limousine borrows that technology. The car is a sealed cocoon with its own air supply. There are oxygen tanks on board. What about a night attack? The car has night vision cameras that project images onto a Heads Up Display (HUD). The driver can see in the dark. Even the gas tank is protected with armor and filled with a special foam (like race cars use) to prevent an explosion. An automatic extinguisher system handles any fires. Besides all of these safety features and protection systems, it is important to note that the presidential limo does not travel alone. It is always part of an impressive motorcade that features Secret Service agents, staff members and a medical team. With its police escort, a motorcade can contain dozens of vehicles. So President Obama should be fairly safe in his limousine. Once sealed inside, however, what can he do besides read a book? For one thing, he can talk to the people riding with him. There's room for four in the back. He also will be able to access some impressive technology. The car features a laptop computer with access to the Internet, plus a secure satellite phone system that will let him talk to anyone in the world. All things considered, President Obama should have a nice ride wherever he goes. Every weekday JewishWorldReview.com publishes what many in the media and Washington consider "must-reading". Sign up for the daily JWR update. It's free. Just click here. Comment by clicking here. Previously: How emergency power works How aircraft carriers work How antibiotics and vaccines work How mucus works How iron and steel work How aspirin works How igloos work How the Predator UAV works How retention ponds work How water absorbers work How melamine works How digital music works How coal mining works How an economic depression works How the liver works How 3D movies work How oil pipelines work How jet packs work How seismographs work How Olympic technology works How Personal Rapid Transit works How 3G works How the Global Position System (GPS) works How octane works How cruise missiles work How submarines work How miles work How octane works How food preservation works How beer works How holding your breath works How smoke detectors work How heat pumps work How your night vision works How concentrating solar collectors work How your key fob works How the common cold works How the Large Hadron Collider Works How making a TV show works How dry cleaning works How exoskeletons work How an oil refinery works How landfills work How the Orion spacecraft works The cutting edge in HDTV Redefining the CD How the HDMI cable scam works How glow-in-the-dark toys work How the subprime mortgage crisis works How gift cards work How Tasers work How giant TV screens work How foreclosure works How Air Force One works How wildfire fighting works How vitamins work How ejection seats work How reattaching limbs works How hot air balloons work How paparazzi work How counterfeiting works How CDs work How the Edsel worked How Stinger missiles work How hybrid cars work How sharks work How mosquitoes work How diesel engines work How water towers work How the Dawn mission works How Kassam rockets work How the North American Eagle works Why aren't we flying to work? How tofu and soy milk work How Colony Collapse Disorder works How airbags work How the U.S. income tax works How gum works How caffeine works How Daylight Saving Time works How a cruise missile works How snow making works © 2007, How Stuff Works Inc. Distributed by McClatchy-Tribune Information Services.

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