In a significant development Russian S-400 Allegedly Downs First Ukrainian F-16 Fighter Jet, Troops Awarded $195K Bounty. In the ongoing Ukraine war, Russian state media claims that a Ukrainian F-16 Fighting Falcon has been shot down by the advanced S-400 missile defense system. If confirmed, this would mark the first successful downing of a Western-supplied F-16 by Russian forces a symbolic and strategic moment in modern warfare.