Prince Mohammed bin Nawaf bin Abdulaziz, Saudi Ambassador to the United Kingdom and Prince Nawaf bin Faisal bin Fahd bin Abdulaziz, General President of Youth Welfare, Chairman of Saudi Arabian Olympic Committee, and Head of Saudi delegation participating in London 2012 Olympic Games attended here yesterday the opening ceremony of the Olympics which was patronized by Britain's Queen Elizabeth II. As many as 10,500 athletes from 204 countries are taking part in the Olympic Games that will conclude on 12 August.