2015 Russian Sukhoi Su-24 shootdown al-Nusra Front fighters. Russia has bombed the area near the Turkish border to support Syrian government forces. Syrian Turkmen formed their own armed brigades called Syrian Turkmen Brigades in opposition to the Syrian government of President Bashar al-Assad, loosely affiliated with other rebels such as the Free Syrian Army. The Turkmen brigades also cooperate with al-Qaeda's Syrian affiliate the al-Nusra Front and with the Salafi coalition known as Ahrar al-Sham. In Latakia the Turkish-supported rebels formed the Jabal al-Turkman Brigade. On 24 November 2015 at 9:24 am, as it was returning to Khmeimim airbase, a Russian Sukhoi Su-24 aircraft with
Sukhoi-Gulfstream S-21 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 much research and development has gone into the management of the troublesome transonic effects phenomena associated with near Mach 1 air