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-Gulfstream S-21 speeds. As of 2012, the project had not received any funding for the 2013-2025 development period and appeared to be cancelled. Sukhoi-Gulfstream S-21 Sukhoi-Gulfstream S-21 was a projected Russian-American supersonic business jet. In the early 1990s, Gulfstream Aerospace and the Sukhoi Design Bureau began a joint effort to develop a supersonic small business jet, code named the S-21. Due to questionable market demand for commercial supersonic air travel, commitment to the project weakened and delays mounted. Gulfstream eventually dissolved the partnership, although Sukhoi continued work on the S-21. The S-21 would be capable of sustained cruise at Mach 2+ and