An Indian passenger train plowed into another near the Taj Mahal early today, killing 21 people and injuring more than a dozen. The rear car of the struck train, which was reserved for women and disabled passengers, took the brunt of the impact. Soldiers and villagers near the accident in Agra worked frantically to free passengers trapped in the twisted steel. "We felt a massive jolt," said a passenger. "People sleeping on upper berths fell to the floor." Authorities are investigating what caused the crash.