Half a world away from two deadly U.S. Navy accidents, sailors on America’s massive USS Nimitz aircraft carrier reflect on the shipmates they knew who are gone. Their commanders want to make sure the same thing doesn’t happen again. The wrenching deaths of sailors, drowned this week while trapped in their bunks on the USS John S. McCain, have reverberated around the American fleet. The Navy has found the remains of two of 10 who were declared missing after the ship crashed into an oil tanker, and the search goes on for others in coastal waters off Singapore. Just in June, seven sailors died when another destroyer, the USS Fitzgerald, hit a container ship off Japan. Out in the blazing Persian Gulf heat on the Nimitz’s flight deck, fighter jets line up to launch for surveillance, intelligence and bombing missions in Iraq and Syria. Up to 10 times a day, …