Michael Phelps, Competing in the 200 meter Butterfly at the London Olympics.
Gabrielle Douglas competing on the balance beam during the Gold Women's All Around Gymnastics competition during the London Olympics, in which she took the gold medal.
Jane Torvill and Christpher Dean,
Sarajevo Olympics, 1984
Miki Ando, Japan - Silver Medalist, Women's Skating at the Vancouver Olympics
China's Hu Yadan during the Women's 10 Meter platform competition at the London Olympics.
Victoria Komova of Russia performs her floor exercise during the Women's All Around Gymnastics competition during the London Olympics in which she won the silver medal.
Michael Phelps and United States teammate, Ryan Lochte competing in the semifinals of the 200 meter individual medley during the 2012 London Olympics. Phelps finished first in the event to take the gold medal, while Lochte was second with the silver.
Mirai Nagasu of the United States, Vancouver Olympics
Women's Omnium at the Velodrome, London Olympics
Mo Farah of Great Britain winning the 10,000 Meters at the London Olympics
Men's Kayak 4 (K4) 1000 Meter Sprint at Eton Dorney during the London Olympics.
Men's 30K Pursuit Cross Country Skiing competition, Vancouver Olympics.
Usain Bolt of Jamaica pulls away to victory and a repeat gold medal in the Men's 100 Meter final at the 2012 London Olympics.
Shani Davis, Men's 1000 meters, Vancouver Olympics
Antoinette Nana Djimou Ida of France throwing the javelin during the Heptathlon competition at the London Olympics.
Yu Na Kim, Gold Medalist, Ladies Skating. Vancouver Olympics
Shen Xue and Zhao Hongbo, Gold Medaiists, Pairs Skating, Vancouver Olympics
Women's marathon during the London Olympics as seen from Westminster Bridge.
Jessica Ennis of Great Britain preparing to throw the javelin on her way to winning the gold medal in the Heptathlon during the London Olympics.
Eric Heiden being awarded one of his five gold medals at the 1980 Lake Placid Olympics
Great Britain team entering the Olympic Stadium during the Opening Ceremonies of the London Olympics.
The Olympic flame with spectators at the Olympic Stadium in the background during the London Olympics