With hundreds of thousands of riders streaming through 145 stations each day, the CTA's sprawling rail system presents a needle-in-a-haystack challenge when it comes to stopping a would-be terrorist from bringing explosives onto a train.
Tony Briscoe and Jason Meisner, Chicago Tribune: Living
Fri, 10/24/2014 - 7:20pm
With hundreds of thousands of riders streaming through 145 stations each day, the CTA's sprawling rail system presents a needle-in-a-haystack challenge when it comes to stopping a would-be terrorist from bringing explosives onto a train.