1969 EC-121 shootdown incident
On 15 April 1969, 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 a North Korean MiG-21 aircraft over the Sea of Japan. The plane crashed 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. aircrew during the Cold War era.