An historical look at the technological engineering of the World Trade Center. The special was completed and the interviews took place before the tragic events of September 11, 2001. Rather than remake the program to reflect the horrors of that day, our program stands as an historical record to the wonder it once was–from the construction of this technological feat to the daily working of its complex system. The program offers some of the last interior footage of the Twin Towers.

Take an in-depth look at the most proven and reliable sources: solar, wind, geothermal, biofuels, and tidal power. From the experimental to the tried-and-true, renewable energy sources are overflowing with potential... just waiting to be exploited on a massive scale.

The world’s largest concrete dam–and the largest concrete structure in the world–lies on the Columbia River in the State of Washington. B uilt in 1931, it is also one of the largest hydroelectric power plants in the world.

The remarkable story of how the landmark New York City skyscraper was constructed during the depths of the Depression. Requiring 10 million bricks and 60,000 tons of steel beams and using a revolutionary technique to hold the steel girders in place–hot rivets–the world’s tallest building was completed four months ahead of schedule.

What does it take to turn twenty tons of steel into top-notch vehicles in less than a day? How does a pile of lumber become a million dollar home in a mere week? Every process, from beginning to end, is a unique and incredible adventure. From the fiery birth of high tech golf clubs to the cataclysmic end of old buildings… get ready to race from Start to Finish.

In Alabama, fly with the Apache Longbow, the deadliest helicopter in world, and learn how to fly the Blackhawk, one of the most sophisticated and versatile helicopters in world. Then climb aboard a Coast Guard helicopter as a team trains for water rescues in the Gulf. In California, see how the immensely popular Robinson helicopters are hand-made and how the police use them to catch fleeing criminals. In Tennessee, learn how million dollar Bell helicopters are customized with everything from bars and entertainment systems to state of the art navigation. Then it's off to Arizona to see how anyone can build their own affordable helicopter in their garage. Finally, learn how drone helicopters that can shoot a movie or take out an enemy.

Where in Washington D.C. is the nation's most incredible treasure chest? It's a library unlike any other in the world–the U.S. Library of Congress. Explode the myth that this 200-year-old institution is simply "where members of Congress borrow books." Viewers are taken beyond the magnificent Jefferson Building Great Hall into the secret vaults where more than 600 miles of shelves hold 130 million items, many of them priceless treasures–from George Washington's hand-written diaries to Galileo's first images of the moon to the original camera film of the movie Frankenstein. See how a staff of 4,000 catalogues protects and preserves these treasures and distributes them globally via a new World Digital Library.

Each year in the U.S., 280 million hens lay 80 billion eggs, one of the world's most affordable sources of protein. We'll chart the "journey of the egg" from henhouse to breakfast table…from massive traditional Iowa farms, where millions of eggs move from hens to delivery trucks without being touched by human hands…to "cage-free" and "pasture raised" farms where chickens have more room to roam but consumers pay the price. Find out what labels like "Grade A, Organic" and "Omega-3 Enhanced" really mean. See how powdered eggs get made and what happens to the billions of whites and yolks that go their separate ways. Try the world's largest omelet, made from an ostrich egg, the equivalent of 24 chicken eggs. How about some pickled eggs or "century" duck eggs? And prepare to be awed by the "Michelangelo" of the egg-shell world as he sculpts egg shells less than 1/32 inch thick into jaw-dropping works of art.

Chronicles one of the most incredible engineering feats of all time: construction of the 51-mile canal that took 10 years to build and employed over 40,000 workers, 6,000 of whom died of yellow fever, malaria, and other horrors. An earlier, 9-year attempt by the French ended in failure and cost 20,000 lives.

Chili head alert! It's time to get hot and spicy. First we'll take you to the home of sizzling Tabasco sauce–McIlhenny Company of Louisiana, and to McCormick in Baltimore, Maryland–the leading spice manufacturer in the world. Then, head down south to see who likes it hot at the Southern Mississippi Chili Cook Off. At the Chile Pepper Institute, taste the rare "Bhut Jolokia," the hottest Chile pepper in the world, and learn about the chemical substance capsaicin, which gives the "Bhut" and other popular peppers their tongue-burning heat. At Sol Toro restaurant in Connecticut, owned by basketball great Michael Jordan, customers need to sign a waiver to dine on their sizzling dishes. Go to the manufacturers of horseradish, wasabi and mustard to find out how their roots and seeds deliver their own distinctive blazing burn. Using the same heat many savor, we'll demonstrate the powerful punch of pepper spray as a weapon.

Follow the soybean from field to refinery with CHS, Inc. as they convert billions of soybeans into vegetable oils, flour, and soy meal. These products, in turn, end up in salad dressings and margarines, baked goods, animal feed and even bio-fuel and plastics. Pay a visit to the Kelley Bean Company which cleans 80,000 pounds of dry beans per day. B & M Baked Beans stirs up some New England tradition by baking beans in steel kettles and brick ovens. Then, Italian chef and bean lover Cesare Casella whips up a few bean dishes using rare heirloom beans, some of which cost $35 per pound. For dessert, Japanese pastry makers prepare traditional bean-based confections with the azuki bean. Fry up some falafel and puree some beans into a paste called hummus with the most widely consumed legume in the world…the chickpea. Last but not least, the makers of Beano explain how it works to prevent that unfortunate bean byproduct: gas.

The only thing harder than resisting our favorite snacks is ranking them. But this special episode of Modern Marvels counts down the top ten lip-smacking treats Americans love most. We raid the pantry–and our rich archives–showcasing the indulgently decadent, the heart-healthy, and the wildly delicious spectrum of grab-and-go delights in between. It's a nationwide culinary journey leading to our number 1 choice–a snack so irresistible that Americans consume almost half the world's supply.

The Panama Canal is considered the 7th wonder of the modern world. But today, it is too small. Now in order to fit the worlds’ growing fleet of super ships, the Panama Canal is getting a complete overhaul. This all-new, one-hour Modern Marvels takes us inside the billion dollar Panama Canal Expansion Project. With unprecedented access, this program features exclusive footage of the building of the new canal and shows us what it takes to complete one of the greatest construction projects in history. From massive explosions at the excavation site to eighteen hour concrete pours at the lock walls... from the assembly of the largest locks gates in the world to their transport on the backs of semi-submersible ships across the Atlantic... With the help of visually stunning photography and ample use of drone and time-lapse cameras, we'll follow the building of a modernized Panama Canal and capture the impressive scale and pace of this undertaking.

Take a journey into the world of super sized, super strong, super unique ships. The Scripps Institution of Oceanography takes viewers out to sea to see how their FLIP research vessel flips a full 90 degrees, sinking over three quarters of its 355-foot length. In Miami, go behind the scenes of one of the largest cruise ships in the world. In California, step onboard the Navy's newest, most advanced transport ship and take a spin in one of America's strongest and greenest tugboats. In Boston, venture into the frigid world of an LNG carrier, transporting enough natural gas to power a million homes for an entire week. In Maine, hop on "the Cat," the fastest car ferry in North America–it's a huge twin-hulled catamaran. Finally, learn how a ship that looks like an enormous spider on water may someday save lives.

America has always prided itself on its technological strength–and this countdown embarks on an odyssey featuring the strongest of the strong. Whether they lift, pull, hold or haul, every heavy-duty titan among our top ten choices has the muscle to reshape our world. Our contenders take our cameras on land, sea and air as they push the limits of power and endurance beyond the imaginable. And our choice at number 1 pulses with so much strength it could destroy our other nine finalists with one push of a button.

Looks at how one man’s vision and the cooperation between the U.S. and England resulted in an instant, reliable transcontinental mode of communication in the mid-1800s. See how wealthy 33-year-old Cyrus West Field endured many failures and lost millions in his attempt to close the communication gap between the Old and New Worlds.

It's the most popular fish in the American diet. From the school lunch box–to the high end sushi bar–to the outdoor barbecue, tuna crosses all demographic lines. We'll go fishing with the men who risk their lives to bring in a haul, stop in at Bumble Bee, the only major tuna cannery still operating in America, and visit the world's largest fish market in Tokyo, where a single tuna can sell for as much as $100,000. We'll also explore worldwide efforts to save the giant bluefin tuna, which has been over-fished to a point of peril. Then we'll head to sea with scientists who track the tunas' inter-oceanic migrations, and travel to South Australia, where entrepreneurs seek to breed the mighty bluefin in captivity.

Take a look at the tallest doors in the world at the Vehicle Assembly Building at Kennedy Space Center. Visit a company that makes blast doors and bulletproof doors. Learn about the surprisingly complex process involved in making home doors, as well as what goes into those commercial entries and exits we use everyday–the revolving door and the turnstile. At the Southwestern Foundation for Biomedical Research, enter through an airlock into their level 4 biohazard lab. The Cleveland Federal Reserve doesn't even send people into their vaults; its robots go in and out. Try some aviation entries and exits–the jet way used to board a plane, the airplane emergency exit procedures we hope to never use, and ejection seats, the fastest exit anywhere. Then, an engineering firm that designs hidden doors will take viewers to see a few of their secret entries. Finally, take a quick look at doors that go nowhere, at the Winchester Mystery House.

This countdown special goes gaga over gizmos–celebrating the most amazing gadgets Modern Marvels has ever featured. Our top ten contenders run the gamut from the indispensable to the insane…from golden oldies to newfangled novelties…all of them showcasing the wonder of human ingenuity. We'll unveil the secrets inside one of the 1960s' most iconic thingamajigs, reveal why an electronic doodad from the '90s was once considered a threat to national security, and rediscover the forgotten marvel created by Benjamin Franklin. Our number 1 pick: a household gadget reinvented so many times that it's inspired more than 4,500 unique patents.

It is among the most versatile, nutritious, and varied foodstuffs in the world. The Potato is the ultimate comfort food. We'll travel from the Potato's mysterious origins in the South American Andes to the ethnic enclaves of New York's lower Eastside, for some tasty Potato Knishes. In Northern Maine we'll discover a farmer of exotic potatoes: blue, green, pink, and dark purple varieties. We'll reveal how large-scale potato producers in Idaho and Pennsylvania slice, dice, freeze, and dehydrate millions of pounds of spuds annually. We'll learn how to mass produce Tater tots and Kettle Potato Chips. Potato Vodka now scores near perfection in international tasting competitions–and we'll visit a Maine distillery at the top of their game. Finally, we'll pay tribute to the iconic Mr. Potato Head, now celebrating its 50th Anniversary, then round out the show with an explosive visit to the makers of some of the world's most sophisticated Spud Guns.

Got something strange to deliver? From pizza to packages, we'll show you how it's packed, labeled and shipped. Head down the highway carrying gigantic wind turbine blades. See how UPS got China's invaluable terra cotta warriors to a Los Angeles art museum. Deliver luxury yachts aboard a submersible carrier ship. Ride to the track with prized thoroughbreds on their own special jet. Want dinner and a movie? Sounds like a visit to Netflix headquarters and Papa John's Pizza. Ride radical with bike messengers in New York City, and deliver a donor kidney to a waiting hospital. Take a tour of the UPS Worldport hub in Louisville, Kentucky, a mammoth center with delivery docks for 100 jets, and handles 1.2 million packages a day.

It's full steam ahead when we drop in at Jay Leno's garage as Jay fires up two of his classic steam cars and takes viewers for a couple of rides. Jay also shows off his 11-ton steam engine built in 1860, back when pigs had to be slaughtered to keep it lubricated. In northern Nevada, fire up a coal burning boiler and get a 100-year-old steam locomotive chugging across the rugged landscape. In New Orleans, board an authentic paddlewheel steamboat. Trek to the Southern California desert where geothermal steam rushes up from the ground and drives electricity producing turbines, powering over 300,000 homes. In New York City, find out why manmade steam surges into some of the world's most famous skyscrapers. Steam clean some very dirty machines, and do a little laundry, too. And ride a steam-driven carousel and play with some strange, steam-powered robots that are part of a movement called–what else–"steampunk."

For this countdown special, we're buckling up and punching it–as we raid the Modern Marvels archives for the hottest rides we've ever presented. From the retro to the rugged to the reckless, our top ten picks showcase our love affair with vehicles that blow back our hair or quicken our pulses. Our only limitation: they've got to stay earthbound–so no sea or aircraft. Other than that, anything goes…from one of Jay Leno's vintage autos to a sleek battery-driven roadster to a motorcycle you've got to see to believe. Our number 1 choice: a ride so hot that one passionate owner applied for a license to marry it.

The incredible tale of how Gutzon Borglum created the world's largest sculpture by carving the faces of four US presidents (George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln) into the Black Hills of South Dakota. The four figures carved in stone pay tribute to the first 150 years of American history. The hour chronicles the "swiveled pointer" that Borglum put in each president's "head", and how workmen hung like spiders 6,000 feet above the ground to blast away 450,000 tons of rock.

At 4 State Trucks in Missouri, the Chrome Shop Mafia adds some truckers' "bling" to a big rig as viewers tour its 35,000 square-foot treasure trove of chrome. In Illinois, learn just how automotive parts get their luster in a complex electroplating process. And out on the road with some bikers, take a look at how Harley Davidson puts chrome to work both as a decorative surface and a protective covering on engine parts. At a classic car gathering, collectors show off their sparkling tailfins and grilles–and in Michigan, peruse a unique collection of more than 3,000 chrome hood ornaments. See how workers chrome-plate plastic, and learn how chrome puts the "stainless" in stainless steel. Find out how stainless steel flatware is manufactured and explore the iconic, shimmering art deco dome of the Chrysler Building. Finally, a Colorado artist will show viewers how he rescues old chrome car bumpers from the scrap yard and transforms them.