India's Train Tragedy: Investigating the Cause and Demanding Accountability.

A three-train pileup in eastern India killed 275 people and injured about 1,000, drawing fresh scrutiny of the safety and viability of the 19th-century rail network, first built by the British. The system, which snakes across the country for more than 67,000 miles, now handles roughly 22 million passengers each day, according to government figures. Railway officials said the investigation into the collision was ongoing, but that early reports indicated problems with the railroad signals that instruct or warn drivers to stop, slow down or switch to another track.