The Navy pays a steep price keeping an aircraft carrier with escorts on station to deter attacks on oil tanker traffic operating in and around the Persian Gulf as part of the United States’ “maximum pressure” campaign against Iran, according to a new report. The ongoing carrier operations in the region are not only pricey for the U.S. Navy but also creates the potential to disrupt energy markets if a confrontation escalates. Operation Sentinel, the U.S.-led effort to maintain maritime security through the strait, involves deploying more aircraft to the region and sending more U.S. troops to support air defense...