India's Rail Safety Under Scrutiny After Recent Accidents

The investigation into India's deadliest train crash in over two decades is focusing on the electronic track management system, which is suspected to have malfunctioned. The computer-controlled system, called the "interlocking system," directs a train to an empty track and coordinates and controls the signal to an oncoming train. The fail-safe system is supposed to be tamper-proof and error-proof, but there was some kind of problem in the system, according to officials. The investigation is ongoing.