John Pomfret: China Replaces Top Navy Officers Over Sub Disaster. Even though the subtitle (if that's the word) reads: 70 Died in Worst Acknowledged Military Accident; Signs of 'Accountability' Are Seen in Dismissals, a foreign expert on Chinese security issues says, "In our system we regard accidents like losing aircraft or accidents on a submarine as the cost of doing business....In their system it's still much more political."