Both the low-observable Sukhoi Su-57 Felon and older Su-34 Fullback. Capella Space Image
Back in 1955, the Soviet Union flew its bombers in a loop over an air show to give the illusion of having more aircraft than were actually in its arsenal, a move that caused alarm in the West. The resulting ‘bomber gap’ was finally disproven when U2 aircraft were able to systematically photograph Russian airbases. This allowed them to literally count the aircraft. Doing this took incredible resources and...
https://news.usni.org/2021/11/02/commercial-radar-satellites-reveal-russian-stealth-fighters