>> The underground passageway where a New York City bomber detonated a homemade device, was quiet in the early morning hours of Tuesday. After workers cleaned and reopened the area, where would-be suicide bomber Akayed Ullah allegedly set off a pipe bomb strapped to his body. Burning himself and injuring three others during Monday morning's rush hour commute.
The surveillance video showing the device partially exploding in the walk way connecting Manhattan Port Authority and the Times Square subway station. Closed subways lines and roads now reopened for Tuesday's passengers. But despite the massive police response and fortunate lack of casualties, the attack exposed the vulnerabilities of public areas, such as New York City's vast transit system.
Nearly 6 million people ride New York subway each day, and during it one of the systems 472 stations, more stops than any other in the world. That open access is partly will allows US train systems to carry five times as many passengers as airlines. But also leaves it open to unique security breaches, according to a congressional report earlier this year, particularly lone wolf attacker, Ullah allegedly among them.
Undercover police, heavily armed officers, and bomb sniffing dogs are among the security measures, but screening every passenger is an impossible task. And while the NYPD says it has stopped at least 26 terror plots since 2001, the proliferation of lone wolf attackers has made it much harder to do so.