Bombing underscores New York subway system’s vulnerability

Elizabeth Williams via AP

In this courtroom sketch, defendant Akayed Ullah is seen on a video monitor from his hospital room, joined by his attorneys, federal defenders Amy Gallicchio, left, and Juliet Gatto, Wednesday in New York. On the bench at left and on the video monitor at right is Magistrate Judge Katherine Parker.

NEW YORK — The crude pipe bomb that exploded beneath the streets of New York this week served as a chilling reminder of the vulnerability of the city’s subway system, a 24-hour-a-day operation with 472 stations and more than 5 million daily riders.