After 17 elephants were killed by a speeding train in West Bengal, India, the nation's railways and environment ministries are considering deploying unmanned aircraft systems to help prevent such tragedies.

After 17 elephants were killed by a speeding train in West Bengal, India, the nation's railways and environment ministries are considering deploying unmanned aircraft systems to help prevent such tragedies. After 17 elephants were killed by a speeding train in West Bengal, India, the nation's railways and environment ministries are considering deploying unmanned aircraft systems to help prevent such tragedies.