Mass Transit Under Attack

"Mass transit remains vulnerable to attack because relatively small bombs can create large human casualties and airport-like screening is difficult if not impossible to apply to transit systems with multiple entry points."

On July 11th, 2006, a series of seven bombs exploded on Mumbai's commuter rail system which carries over 6 million passengers a day and is considered to have the highest passenger density of any urban railway system in the world. The attacks killed at least 200 and injured 700 people.