Terrorism Close Calls

Three homegrown US operatives link up with Al Qaeda and hatch an audacious terror plot to wreak maximum carnage - they plan to detonate homemade bombs hidden in backpacks simultaneously on various trains in the New York City subway system.

A suspicious online purchase helps start the FBI's investigation into a chemical engineering student's quest to inflict horrendous damage on America.

A number of international intelligence agencies work together to thwart a terrorist scheme to blow up American cargo planes in flight.

A car salesman plans to assassinate the Saudi ambassador to the U.S. with some help from a Mexican cartel member -- who happens to be a DEA source.

Suicide bombers plan to use explosive liquids disguised in sports drinks to blow up at least seven separate planes bound for North America.

A man with ties to white supremacists goes on the run after his plan to bomb a Martin Luther King Day march is foiled by the FBI.