North Korea fired multiple cruise missiles into waters off its western coast on Friday, extending a series of weapons tests. Leader Kim Jong Un called for strengthening his country's naval forces during an inspection of unspecified naval projects at a shipyard. Kim has emphasized building a nuclear-armed navy to counter threats from the U.S., South Korea, and Japan, who have stepped up military cooperation. South Korea's military detected the cruise missile launches but did not provide specifics on type or flight details.