2015 Russian Sukhoi Su-24 shootdown military of its jet's flight plan. The Russian pilot and weapon systems officer both ejected from the aircraft. The weapon systems officer was rescued; the pilot was shot and killed by Syrian rebel ground fire while descending by parachute. A Russian naval infantryman from the search and rescue team launched to retrieve the two airmen was also killed when a rescue helicopter was targeted by the rebels. The shooting down of the Sukhoi Su-24M was the first destruction of a Russian or Soviet Air Forces warplane by a NATO member state since the attack on the Sui-ho Dam (during the
Sukhoi Su-57 produced, and some believe it to be an implicit announcement of the project's cancellation. The slowing of procurement could be because of the current slow growth of the Russian economy, while the future patches' procurement are for an unknown future; the Russian military could be waiting for the more powerful Saturn izdeliye 30 engine to be ready for serial production. On 22 August 2018, during the International Military-Technical Forum «ARMY-2018», the Russian Ministry of Defence and the JSC Sukhoi signed the first contract for delivery of two serial Su-57s. The contract should be finalized between 2018 and 2020. The prototype's