The chief of naval operations said this week the service may take the remaining Oliver Hazard Perry-class guided missile frigates out of retirement to increase the Navy's fleet size. Chief of Naval Operations Adm. John Richardson said June 13 at the Naval War College the service needs to conduct a cost-benefit analysis of the proposal to determine the price to modernize the frigates. The last Perry-class frigate in the Navy's inventory retired in 2015 after 30 years of service. Other...