Wonsan

Ten minutes after takeoff from Kangnung Airport, a passenger came into the cockpit and forced the pilots to divert to North Korea. After crossing the border between both Koreas, the airplane was escorted by three fighters and the crew was forced to land at Sondok Airport near Wonsan. Apparently, the landing was 'missed' and the airplane was severely damaged upon arrival. Nevertheless, none of the 52 occupants were injured but arrested and interned by the North Korean Authorities. Following negotiations with South Korea, 39 passengers were released and sent back to South Korea on 14 February 1970. But all four crew members and nine passengers plus the hijacker were not released. In 2018, the South Korean Government and the families still do not have any information about the fate of these 12 people listed here below:
Yu Byeong-ha (유병하, 38), pilot,
Choe Seok-man (최석만, 37), copilot,
Jeong Gyeong-suk (정경숙, 24), stewardess,
Seong Gyeong-hui (성경희, 23), stewardess,
Yi Dong-gi (이동기, 49), Director of a printing house,
Hwang Won (황원, 32), Director of the Munhwa audiovisual company,
Gim Bongju (김봉주, 27), cameraman for Munhwa audiovisual company,
Chae Heon-deok (채헌덕, 37), doctor,
Im Cheol-su (임철수, 49), office employee,
Jang Ki-yeong (장기영, 40), businessman in the food industry,
Choe Jeong-ung (최정웅, 28), employee for Hankook Slate.

The heavy bomber was attacked and shot down by the pilots of several Soviet MiG-15. All 11 crew members were able to bail out before the aircraft crashed into the Wonson harbor. Two crew members were killed while nine others were rescued.
Crew:
Sgt Bobby D. Abplanalp,
Cpl Lynn W. Dorsey,
M/Sgt Wilbur N. Foster,
1st Lt Luke C. Fyffe, †
1st Lt William J. Haberle, †
1st Lt James W. Harig,
Sgt James A. Johnson,
Cpt Melvin C. Manley,
Cpl Harvey Simon,
Cpl Raymond L. Singleton,
1st Lt Alfred Ziegler.

The aircraft left Daegu in the evening of May 4 on a bombing mission to Wonsan. While attacking the city and flying at low height, the twin engine aircraft hit an obstacle, damaging a propeller. The pilot attempted to evacuate the target area when the aircraft went out of control and crashed into the sea 3 km east of Wonsan. A crew member was rescued while three others were killed.
Crew:
S/Sgt John V. Chitwood, †
1st Lt Douglas B. Kern, †
Cpt Norbert W. Kirkpatrick,
Cpt Robert Martin Jr. †

Hit by enemy fire and crashed into the sea off Wonsan. All three crew members were killed.