1. On 18 September 1950, a North Korean Yak-9P made an emergency landing at Kimpo AB and was captured by US Marines. The aircraft was sent to Wright-Patterson AFB and tested. The evaluation report stated the aircraft was extremely capable but crude by Western standards.
2. This Yak-9P is preserved in the Warsaw Aviation Museum. The Yak-9P was one of the first all-metal design produced in the Soviet Union.