The Russian Knights display team flying Sukhoi Su-27 Flankers demonstate the firing of countermeasure flares. Courtesy SukhoiPilot Killed As Russian Air Force Jets Collide -- The Guardian
Two fighter aircraft rehearsing for air show crash near airfield east of Moscow
Two Russian air force fighters rehearsing acrobatic manoeuvres collided near Moscow today, killing one of the pilots and sending the aircraft plummeting into holiday homes, a military official said.
The Su-27 fighter aircraft were part of the elite Russian Knights flying group and had been preparing to perform at the Maks-2009 air show, the largest and most important exhibition for Russia's aerospace industry.
Lieutenant colonel Vladimir Drik, an air force spokesman, said he jets collided near the Zhukovsky airfield, east of Moscow, where the air show opens on Tuesday.
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Update #1: Two fighter jets collide in mid-air during MAKS 2009 air show rehearsals -- Pravda
Update #2: Fighter jets collide before Moscow air show -- RT Video
My Comment: This is rare accident. This is a unique squadron that is well known in Europe.