New York City has spent 212 million dollars on security protection against terrorist attacks.

This means thousands of cameras and motion detectors are all over the Subway system, but none of this will stop the terrorist threats.

The majority of nuclear weapons can be found in the United States and Russia.

And there is enough nuclear materials stored in reactors in over 43 countries, which could be used to make nuclear weapons.

National Day of Prayer 2012

Ten years after the Cold War, there are more more than 30,000 nuclear weapons worldwide.

These weapons amount to hundreds and thousands of tons of nuclear materials.

Al-Qaeda may have tried to get nuclear material from stealing or buying it from groups willing to sell them loads of weapons that are available in countries all around the world.