Transport security

A freeway terror attack is the 'nightmare we worry about,' law enforcers say

The alleged 91 Freeway plan is one of many plots uncovered in the United States that targeted transportation. According to the New York Police Department, plans included cutting the support cables of the Brooklyn Bridge, exploding bombs in the New York subway system and blowing up train tubes under the Hudson and East rivers.

"Transportation targets are fairly common with terrorists, but they usually involve mass transit, aircraft or bridges," Levin said. "A horrendous operation such as the one envisioned in the complaint not only confines civilians while they would be under vicious attack but obstructs and places first responders at risk from sniper fire as well."