Swimming at the London 2012 Olympics (405 images)

Michael Phelps of the United States gets ready to swim his heat in the Men's 100M Butterfly at the London 2012 Summer Olympics on August 2, 2012 in Stratford, London. Phelps qualified for the final with a time of 51.72 in his heat. UPI/Brian Kersey

Michael Phelps of the United States swims his heat in the Men's 100M Butterfly at the London 2012 Summer Olympics on August 2, 2012 in Stratford, London. Phelps qualified for the final with a time of 51.72 in his heat. UPI/Brian Kersey

Michael Phelps of the United States swims his heat in the Men's 100M Butterfly at the London 2012 Summer Olympics on August 2, 2012 in Stratford, London. Phelps qualified for the final with a time of 51.72 in his heat. UPI/Brian Kersey

Elizabeth Beisel of the United States swims her heat in the Women's 200M Backstroke at the London 2012 Summer Olympics on August 2, 2012 in Stratford, London. Beisel's time of 2:07.82 qualified her for the semifinal. UPI/Brian Kersey