The massive derailment involving two passenger trains is a stark reminder of safety issues that continue to challenge India's vast railway system that transports nearly 22 million passengers each day.

By Sheikh Saaliq, Associated Press

In North Dakota an oil boom has transformed the state's economy. Nearly a million barrels of crude come out of the ground each day in the state, and instead of traveling by pipeline, most North Dakota oil goes by rail.

By PBS News Hour