On September 11, 2001, an unimaginable horror unfolded that devastated a nation and the world. Fifteen years later, we are still gripped by terror, but it has transformed.

The attacks have been coming fast and furious - to Boston, Paris, Brussels, San Bernardino, Orlando, Nice - but they are no longer commanded by a central entity.

This is terrorism in the age of the Internet: crowd-sourced violence. In this special report, NOVA traces the evolution of terror strategies from the World Trade Center to today.

How have radical organizations grown to make use of modern propaganda and social media tools in order to cultivate an army of self-radicalized killers?

What is going on inside the minds of this new breed of terrorist? What new techniques and technologies can help law enforcement cope with this elusive threat?

And how can psychology and technology be leveraged to end this dreadful cycle of terror?

If you would like to win a copy of this riveting new DVD, just answer this easy question about 9/11: Exactly how many men hijacked four fuel-loaded US commercial airplanes bound for west coast destinations on that fateful day?

Send us your answers and if you are correct you will be in the running to win one of these new DVDs! Just send us an e:mail here before July 15th, 2021 with your answer and the subject title CONTEST: 15 YEARS OF TERROR DVDs to: exclusivemagazine@flash.net

PBS DVD Purchase Link