The Su-34 Is Russia s Best Precision Bomber, And Ukraine s Top Target forbes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from forbes.com Daily Mail and Mail on Sunday newspapers.
The jets, which still have thousands of miles left on their clocks and could continue to fly for several years, will be grounded after completing just 40 per cent of their predicted flying hours.