Prosecutors say the USNS Mercy, seen last week entering the Port of Los Angeles, was the target of a train engineer’s unsuccessful attack on Tuesday. The derailed train slid to a halt more than 250 yards from the hospital ship. The Mercy was unharmed, and no one was injured.

Prosecutors say the USNS Mercy, seen last week entering the Port of Los Angeles, was the target of a train engineer’s unsuccessful attack on Tuesday. The derailed train slid to a halt more than 250 yards from the hospital ship. The Mercy was unharmed, and no one was injured.