Britain's Queen Elizabeth stands in the forecourt of London's Buckingham Palace as she observes a two-minute silence in memory of the victims of the London bombings, July 14, 2005. (Xinhua/AFP photo)

Spanish Prime Minister Jose Luis Rodriguez Zapatero (2nd L), President of the Valencian Community Francisco Camps (L), Valencia town Mayor Rita Barbbera (2nd R) and minister for public administration Jordi Sevilla during two-minute silence in memory of the victims of last week's bombings in London, July 14, 2005, in Valencia, Spain. (Xinhua/AFP photo)

Over 1000 people observe a two-minute silence in remembrance of the victims of the London terror attacks, at Kings Cross train station, London. (Xinhua/AFP photo)