The Navy will focus on improving its readiness, capability and capacity in the next decade to maintain its advantage at sea, Chief of Naval Operations Adm. Michael Gilday said in the new navigation plan the service released Monday. Gilday, who announced the release of the plan during a speech at the Surface Naval Association National Symposium Monday, said the nation's security is under threat from both China and Russia. "Optimism that they might become responsible partners has given way to...