The 1969 EC-121 shootdown incident occurred on April 15, 1969 when a United States Navy Lockheed EC-121M Warning Star of Fleet Air Reconnaissance Squadron One (VQ-1) on a reconnaissance mission was shot down by North Korean MiG-17 aircraft over the Sea of Japan. The plane crashed 90 nautical miles (167 km) off the North Korean coast and all 31 Americans (30 sailors and 1 marine) on board were killed, which constitutes the largest single loss of U.S.