The Olympic rings light up the stadium during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Morry Gash, Pool)

In this photo taken with a fisheye lens, the Red Arrows perform a fly past over the Olympic Stadium during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Matt Dunham)

The Olympic rings light up the stadium during the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/David J. Phillip)

The Red Arrows aerobatic team flies over the Olympic Stadium ahead of the Opening Ceremony of the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Ben Curtis)

The time reads 20:12:00 on the scoreboard at the hockey venue as light from the setting sun peeks through the clouds prior to the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Julio Cortez)

The Royal Air Force Red Arrows fly over Olympic Stadium before the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Gregory Bull)

A member of the media covers himself with a newspaper during a rain shower ahead of the Opening Ceremony at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Jae C. Hong)

Canadian swimmer Brent Hayden does kicking drill during a training session for the London 2012 Olympics in London, Friday July 27, 2012. (AP Photo/The Canadian Press, Frank Gunn)

RS:X athlete Lee Tae Hoon, from South Korea, trains ahead of the London 2012 Summer Olympics, Friday, July 27, 2012, in Weymouth and Portland. (AP Photo/Bernat Armangue)

A young woman wears a London Olympics logo on her cheek outside the Olympic Park ahead of the 2012 Summer Olympics Opening Ceremony, Friday, July 27, 2012, in London. (AP Photo/Matt Rourke)

Members of the British military rest after working at the ExCel Centre at the 2012 Summer Olympics, Friday, July 27, 2012, in London. Competition begins at the venue on Saturday. (AP Photo/Andrew Medichini)

New Zealand's Caroline Lenamore runs with her horse Lenamore during horse inspection for the equestrian eventing competition at Greenwich Park, the site for the equestrian and modern pentathlon events at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Markus Schreiber)

A member of Ukraine's women's rowing team passes under a bridge during training in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, Friday, July 27, 2012. (AP Photo/Natacha Pisarenko)

Foils handles are seen during a fencing training session in the ExCel Centre, at the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Andrew Medichini)

Members of the New Zealand cycling team train ahead of the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Matt Rourke)

Argentina's Agustin Mazzilli and South Korea's Nam Hyun-woo tangle their sticks during a practice match for the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Eranga Jayawardena)

French swimmer Coralie Balmy wears nail polish in the colors of the national flag as she prepares for a practice session at the Aquatics Centre in the Olympic Park ahead of the 2012 Summer Olympics, Friday, July 27, 2012, in London. (AP Photo/Daniel Ochoa De Olza)