. "The Soko J-21 Jastreb is a Yugoslav turbojet attack aircraft, designed by the Aeronautical Technical Institute (ATI), (Serbian: Vojnotehni\u010Dki Institut Beograd (VTI)), in Belgrade and manufactured by SOKO. Derived from the G-2 Galeb advanced jet trainer and light attack aircraft, it was designed in single-seat ground-attack and two-seat advanced flying / weapon training versions."@en . "Soko J-21 Jastreb"@en . . . . . . "The Soko J-21 Jastreb is a Yugoslav turbojet attack aircraft, designed by the Aeronautical Technical Institute (ATI), (Serbian: Vojnotehni\u010Dki Institut Beograd (VTI)), in Belgrade and manufactured by SOKO. Derived from the G-2 Galeb advanced jet trainer and light attack aircraft, it was designed in single-seat ground-attack and two-seat advanced flying / weapon training versions."@en . .