The story

The FBI earned its reputation hunting down bank robbers and other outlaws in the heydays of Bonnie and Clyde and Al Capone.

But now, as it hits the century mark, the agency's mission has changed. Instead of toting Tommy guns, robbing banks and running numbers rackets, today's Public Enemy No. 1 is more likely to be carrying box cutters, mixing dirty bomb ingredients and plotting mass casualties.

Since September 11, 2001, the FBI's priority has been to prevent another terrorist attack on U.S. soil.

CNN was given access to the Newark, New Jersey, FBI field office and top counterterrorism officials who oversee threat investigations. The routine has shifted away from the traditional cops and robbers methods.

Today's FBI focuses on vigilance and anticipating the worst. Read full article »

All About Federal Bureau of InvestigationTerrorismSeptember 11 Attacks

FBI at 100
CNN's "American Morning" looks at the transformation of the FBI as it turns 100
6 a.m. Tuesday and Wednesday

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