Law enforcement officials look back on attempted terrorist attacks that were thwarted in the nick of time.

The NY City Subway Plot 48m As three young terrorists finalize plans to detonate bombs on New York City's subway, law enforcement agencies work tirelessly to halt the attacks.

The Student Bomb Maker 49m A suspicious online purchase helps start the FBI's investigation into a chemical engineering student's quest to inflict horrendous damage on America.

Cargo Bomb Plot 48m A number of international intelligence agencies work together to thwart a terrorist scheme to blow up American cargo planes in flight.

Operation Chevrolet: The Plot to Kill Saudi Ambassador 48m 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.

Operation Overt: The Transatlantic Liquid Bomb Plot 49m Suicide bombers plan to use explosive liquids disguised in sports drinks to blow up at least seven separate planes bound for North America.

Martin Luther King Day Plot 49m 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.

The Sauerland Cell: Plot to Kill U.S. Soldiers 49m Four terrorists plan a two-pronged attack in Germany: detonate bombs in popular nightclubs, followed by larger bombs in the streets once people flee.

The Israel Honey Trap 47m A young mother's suicide attack at an Israeli checkpoint ignites interest in her motivations as well as her baffling backstory.

Australian Anzac Day Plot 48m The arrest of a 14-year-old boy in England sparks a frantic investigation into a terror plot halfway around the world in Australia.