Sources

-https://bulgarianmilitary.com/2025/05/12/russian-air-force-receives-new-batch-of-su-35-fighter-jets/
-https://indiandefencereview.com/russian-su-35-flanker-fighters-suffer-heavy-losses-ukraine/?utm_source=chatgpt.com
-https://newsukraine.rbc.ua/news/us-doubts-f-16-was-hit-by-friendly-fire-from-1725194577.html?utm_source=chatgpt.com