North Korea confirmed Friday it conducted its third test-firing of a new “super-large” multiple rocket launcher that it says expands its ability to destroy enemy targets in surprise attacks. The latest launches extended a monthslong streak of weapons displays by the North, which continues to use a standstill in nuclear negotiations to advance its military capabilities while pressuring Washington for concessions. Pyongyang’s official Korean Central News Agency described the tests a day after the South Korean and Japanese militaries said they detected two projectiles launched from an area near the North Korean capital traveling more than 321 kilometers (200 miles) cross-country before landing in waters off the North’s eastern coast.