With half of the Navy's amphibious fleet in "poor condition," the ships are not on track to meet their expected service lives, according to the government’s top watchdog. Facing the unlikeliness of meeting the 31 amphibious ship statutory requirement, the service is considering extending ship service lives – an effort that will require up to $1 billion per ship, according to the Navy. Delayed and canceled maintenance, challenges acquiring spare parts and reliability of ship systems have deteriorated the fleet...