On Aug. 21, 2015, the world watches in stunned silence as the media reports a thwarted terrorist attack on a train that's bound for Paris -- an attempt prevented by three young Americans traveling together through Europe. The heroic and courageous actions of Anthony Sadler, Alek Skarlatos and Spencer Stone help to save the lives of more than 500 passengers on board.

After the elevators at a New York City skyscraper begin inexplicably malfunctioning, putting its passengers at risk, mechanic Mark Newman and reporter Jennifer Evans begin separate investigations. Newman gets resistance from superiors at his company, which manufactured the elevator, while additional elevator incidents cause several gruesome deaths. The police get involved and suspect that terrorists are responsible, but a far stranger explanation looms.

In honour of the 15th Anniversary of 9/11, National Geographic Channel is looking back at the very best reporting we have done since this world-changing tragedy first happened using extended excerpts from past specials that relate directly to events leading up to and following the attacks on New York City and Washington DC.

A great French restaurant's owner, Monsieur Septime, is thrust into intrigue and crime, when one of his famous guests disappears.

When wealthy executive Raymond Stone sends out his private plane to pick up his spoiled teenage daughter, Nicole, and a pair of his top-ranking employees, disaster strikes. While the jet flies through an electrical storm, the pilot and other passengers are incapacitated, and Nicole is left on her own to keep the plane in the air, guided by an air traffic controller. Can the irresponsible and panic-stricken teen find a way to land the jet?

The best agent of Vieng, the country near the boundary of Thailand received the important mission that he had to catch two armed dealers who could be the dangerous for his country.

In 1971, five college buddies from the University of Texas embark on a final road trip odyssey across the Mexican border before facing up to uncertain futures, in Vietnam and otherwise.

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When a love letter falls into Sara's hands that is not meant for her, but whose addressee remains unclear, her curiosity is aroused. The words on the paper have caused something in her to resound, which she wants to trace. The surprising path of feelings makes its way through the jungle of life.

Two boys from a small town find their courage tested when they accidentally stow away aboard an airplane owned by the mob...

Badal is a victim of the 1984 riots, brought up by a terrorist. Badal aims to kill the treacherous police officer who had killed his parents and his loving sister. He takes shelter in the house of an honest police officer and falls in love with a minister's granddaughter. Will he be able to accomplish his revenge?

Journalist Amar falls for a mysterious woman on an assignment, but she does not reciprocate his feelings. However, when Amar is about to get married, the woman shows up at his doorstep asking for help.