On September 11, 2001 two aircraft are deliberately flown into two buildings of the World Trade Center and one is flown into the Pentagon. Another crashes in a field in rural Pennsylvania.

On 17 July 1981, 1,500 people had gathered for a dance in the Hyatt Regency Hotel when, in a catastrophic disaster, the skywalk collapses killing 114 people and injuring countless others in the worst US structural failure.

On Boxing Day 2004, the second largest earthquake in recorded history with a magnitude of 9.3 strikes the town Banda Aceh, Indonesia. Soon, it unleashes a tsunami which takes over 275,000 lives all along the coast of the Indian Ocean. How come such a disaster happened?

On 17 January 1995, the Japanese city of Kobe was rocked by the Great Hanshin Earthquake, which destroyed buildings and killed over 1000 people and left thousands homeless. Why couldn't the top of the art equipment predict a disaster of this magnitude?

On 3 April 1974, the most violent outbreak of tornadoes in history struck. The well-named "Super Outbreak" produces 148 twisters over 13 American states and in Ontario, Canada destroying thousands of homes and over 5,000 people die. How did a single storm form the 1974 "Super Outbreak" tornadoes?

The Texas BP oil refinery is the third largest in America producing more than 437,000 barrels per day. Workmen are starting a routine day, then, and explosion rocks the structure with the death of 15. What went wrong?

The DH Comet is the first jet airliner and the pride of the British Overseas Airways Corporation. But on January 10, 1954, BOAC Flight 781, enroute from Rome to London, explodes catastrophically and crashes, killing 35 people. The investigation begins, but when South African Airways Flight 201 crashes exactly the same way taking another 21 lives, all Comets are grounded and the investigation takes a step forward.

On the night of 18 November 1987, a harmless match produced a small flame on the escalator at King's Cross tube station. Suddenly, the containable flame explodes rapidly into a fireball. It charges up the escalator and kills 31 people in the ticket hall 20m away. The inferno leaves investigators stumped. When the answer is revealed, it will shock everyone, adding a new chapter to the laws of fire dynamics.

Mount St. Helens, in the countryside of Washington State, has been dormant for 123 years. But on May 1980, it suddenly erupts, killing 57. Why couldn't they predict it?

Two Jumbo Jets, Pan Am 1736 and KLM 4805 collide on the lone runway at Tenerife, Spain. The two aircraft are then burnt out and 583 people lose their lives. But how come two experienced pilots made a mistake of this magnitude? How come two passenger jets collided on the runway?

On 11 March 2011, a massive earthquake and tsunami off Japan’s coast caused a meltdown at the Fukushima Nuclear Power Plant.

American Airlines Flight 191, a DC-10, leaves Chicago. But when the engine falls off, the plane stalls and crashes killing 273 people. The investigators discover a shocking secret which will turn the aviation world upside down.

November 11, 2000, started out as a normal day at the Kaprun ski resort in Austria, as a Furnicular train climbing the slopes breaks down in a tunnel. Passengers then realise it's on fire. Only 12 make it out alive, leaving 155 people to die horribly. But how could such a modern train break down and catch fire?

On March 1987, the British Car Ferry Herald of Free Enterprise capsizes off Zeebrugge killing 193. Why did this happen? Was it just a terrible blunder? Or something worse?

On May 1996, what started out as a normal flight from Miami, Florida, to Atlanta, Georgia, when ValuJet Flight 592, a DC-9 with 110 people on board goes down in the Everglades when a fire starts in the cabin and cockpit. The aircraft is swallowed by the swamp and harsh conditions make the rescue operation impossible. Soon there are no survivors. What happened to ValuJet 592 is a one of a kind accident.

On September 2, 1998, a fire broke out on Swissair Flight 111 while in-flight, damaging vital systems and causing the aircraft to crash into the sea off Peggy's Cove with no survivors. The fire was caused by faulty wiring in the onboard first class entertainment system.

On July 1, 2002 a cargo airliner and a passenger airliner collide while they are over Überlingen in Germany. The two aircraft crash, killing all on board.

On August 9, 1945, the United States of America, during the final stages of World War II in 1945 bombed the Japanese cities of Hiroshima and Nagasaki causing a huge death toll.

On 13 January 1982, Air Florida Flight 90 leaves Ronald Reagan National Airport in Washington DC for Miami with 79 passengers and crew on board. The Boeing 737 is delayed for hours by bad conditions, and only seconds after getting airborne it crashes into the icy Potomac river. Five survivors are pulled out alive but 78-including four motorists-lose their lives.

The massive aircraft carrier USS Forrestal is sailing to Vietnam on July 29, 1967, when a fighter jet explodes, a massive blast rocks the ship, and in just 17 hours 134 men lose their lives. Was it hostile fire, human error, or a fault in the fighter jets.

The Humberto Vidal Shoe Store was just like any other. But one day in Puerto Rico, a gas explosion kills 33 and injures 69 people.

During the 1972 Olympic Games in Munich, 11 Israeli athletes are been held hostage by Palestinian terrorists. They demand the list of Palestine prisoners in exchange for the release of the ahtletes. But at Furstenfeldbruck Airfield, a rescue attempt goes wrong and soon 17 people are dead.

In 1963 a landslide from Monte Toc into the reservoir of the Europe's highest dam caused a giant flood wave that destroyed the village of Longarone and other villages, claiming over 2,000 lives.

On the Caribbean island of Montserrat is the Soufrière Hills volcano. Nearby is Plymouth, the island's capital. In 1995, Soufrière Hills came to life and spewed ash over the island. Everyone is evacuated to the north of Montserrat. Two years on, the eruptions get worse and in 1997, Soufrière Hills erupts violently. Pyroclastic flows rage down the mountain and destroy Plymouth and Bramble Airport, killing 23 people. It generates a small tsunami. People crowd onto ships to escape their home, knowing it's been destroyed.

We make mistakes every few seconds of our lives. They are unavoidable. But sometimes the results can be disastrous. On April 26, 1986, a series of catastrophic blunders leave dozens dead when the Chernobyl Nuclear Power Plant melts down.

On April 25, 2005, a seven-car commuter train came off the tracks and crashed just before Amagasaki Station in Japan causing 107 deaths and 562 injuries.

On August 6, 2011, a U.S. Boeing CH-47 Chinook was shot down while transporting a quick reaction force attempting to reinforce an engaged unit of Army Rangers in Wardak province, west of Kabul, Afghanistan. The resulting crash killed all 38 people on board.

April 1992, Guadalajara, Mexico. On the 19th, residents start complaining of a strong gasoline-like smell coming from the sewers. Three days later, on the 22nd, numerous gas explosions in the sewers over a time span of four hours destroy kilometers of housing estate and killing 206 people. But who, if anyone, is to blame? What caused the inferno in Guadalajara?

One April morning in 1995, at Oklahoma City's Alfred P. Murrah Federal Building, Timothy McVeigh parks a truck packed with explosives at the front of the government landmark. At 9:02AM, it explodes and the front of the building collapses with a loss of 168 lives. Survivors recount the terrifying experience as investigators attempt to discover what caused the building to collapse.

September 11, 2001 is one of the worst days in history. In Washington, D.C, the workers at the Pentagon have only just heard of the chaos going on at the New York World Trade Centre, but are unaware that they themselves have become a target. American Airlines Flight 77, a Boeing 757 aircraft, collides with the Pentagon killing 189. Pentagon 9/11 recreates the events leading up to the explosion at the Pentagon.

Mont Blanc is one of the highest mountains in Europe, with a seven-mile long tunnel connecting France and Italy through the Alps. One March day in 1999, a Belgian Truck carrying flour and margarine catches fire in the tunnel, creating a blaze which burns for 53 hours, killing 39 people. A team of investigators set out to prove what caused such a terrible fire, and why all tunnels could be merely Seconds from Disaster

When the zeppelin Hindenburg catches fire at Lakehurst, 35 of the 97 on board and one member of the ground crew are killed. Was the most infamous airship disaster caused by a ticking time bomb smuggled on board? Or was the Hindenburg itself a ticking time bomb?

On October 5, 1999 two trains collide at Ladbroke Grove junction near London's Paddington station after the driver of one fails to stop his train at a red signal.

September 1993. The captain of a towboat unwittingly causes the collapse of a bridge over the Big Bayou Canot. When an Amtrak train comes along, it derails with 47 lives lost. Why was such a hideous mistake made? How could it have been prevented? Could it have been prevented at all? Wreck of the Sunset Limited explains why over 40 people died that Autumn day.

On 19 July 1989, the pilots of United Airlines Flight 232 are shocked to learn they have lost all control of the DC-10 after an engine failure and make an emergency landing at Sioux City, Iowa, but in a dramatic crash, the aircraft breaks apart and catches fire with 111 lives lost out of the 285 on board. Why did the engine fail?

On July 1985, Italy's Stava Dam collapses and demolishes 70 structures killing 268 people in the process. Was there a fault in the design of the dam? Is this something that could happen to any dam around the world? Find out how a structural failure leads to a massive catastrophe with Flood at Stava Dam

Al Queda struck again on August 7, 1998. In Dar-es-Salaam, Tanzania, and Nairobi, Kenya, a truck bomb destroys the U.S. Embassy buildings killing 257 and injuring thousands.

Behind every disaster lies a chain of events. The Concorde was the world's first supersonic airliner, but on a charter flight to New York, 109 people are on board an Air France Concorde as it takes off from Paris. But as it lifts off the runway, the control tower notices flames trailing behind the aircraft. They can do nothing. The Concorde becomes uncontrollable and plows into a hotel in nearby Gonesse. 113 people are killed in the accident. The dream that was Concorde is shattered and the aircraft is grounded. What happened to Air France Flight 4590 could shatter the aviation industry as we know it.

Its been more than two months after 9/11 and the event is still fresh in everyone's mind. At JFK Airport in Queens, American Airlines Flight 587, an Airbus A300, leaves on a three and a half flight to Santo Domingo in the Dominican Republic. Shortly after take-off it crashes into Rockaway in Queens, New York. This place is home to people affected by 9/11. 257 people die. Was this terrorism again? Or a fault?

On Easter 1990, a fire breaks out on the Scandinavian Star Ferry. After been towed to Sweden, the fire is eventually put out after 10 hours. Then the worst is revealed. 158 people have lost their lives. But why on Earth did they die? An investigation is immediately started, but the truth will shock them.