Olympic Stadium, Aquatics Center in London Photo taken on Feb. 21, 2012 shows the ArcelorMittal Orbit, Olympic Stadium and Aquatics Center...

Olympic Stadium, Aquatics Center in London

Photo taken on Feb. 21, 2012 shows the ArcelorMittal Orbit, Olympic Stadium and Aquatics Center in London, capital of Britain. (Xinhua/Xiang Mei)

Photo taken on Feb. 21, 2012 shows the Olympic Stadium and Aquatics Center in London, capital of Britain. (Xinhua/Xiang Mei)

Photo taken on Feb. 21, 2012 shows the Aquatics Center in London, capital of Britain. The Aquatics Center will be the venue for swimming, Paralympic swimming, diving, synchronized swimming and the swimming element of modern pentathlon. (Xinhua/Xiang Mei)

Photo taken on Feb. 21, 2012 shows the inside view of the Aquatics Center in London, capital of Britain. The Aquatics Center will be the venue for swimming, Paralympic swimming, diving, synchronized swimming and the swimming element of modern pentathlon. (Xinhua/Xiang Mei)

Photo taken on Feb. 21, 2012 shows the ArcelorMittal Orbit and Olympic Stadium in London, capital of Britain. The Olympic Stadium will host the athletics events of the London 2012 Olympic Games and the Paralympic athletics events, as well as the opening and closing ceremonies. (Xinhua/Xiang Mei)

Photos taken on Feb. 21, 2012 show the ArcelorMittal Orbit, Olympic Stadium and Aquatics Center in London, capital of Britain.

The Olympic Stadium will host the athletics events of the London 2012 Olympic Games and the Paralympic athletics events, as well as the opening and closing ceremonies.

The Aquatics Center will be the venue for swimming, Paralympic swimming, diving, synchronized swimming and the swimming element of modern pentathlon.