It is not a sight you would wish to see as you prepare for a long flight. But passengers on a Russian service from Moscow to the Siberian city of Krasnoyarsk were left terror-struck when what appeared to be a hole in the engine was spotted. The flight was delayed for a safety inspection - but took off two hours later, with the 'hole' still unplugged. Twenty-seven passengers refused to fly, and disembarked from the plane ahead of its departure - and safe journey to Siberia. The Boeing 737 was about to leave the Russian capital when the defect was...