LONDON (Reuters) - London, an ancient city steeped in theatre and pageantry, stages its third summer Olympics against a somber backdrop tempering the excitement and anticipation before the world's greatest sports festival.
Euphoria in Singapore, where London secured the Games in 2005, was succeeded within 24 hours by horror in the British capital when 52 commuters were killed by four suicide bombers.
London OIympic Games open in troubled times
