Oxana Savchenko of Russia competes during the women's 100m freestyle S12 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Oxana Savchenko won the gold and created the new world record with 58.41 seconds. (Xinhua/Yang Shiyao)

Lantz Lamback of the United States celebrates for victory after winning the men's 50m freestyle S7 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Lantz Lamback won the gold with 27.84 seconds. (Xinhua/Yang Shiyao)

Lantz Lamback of the United States celebrates for victory after winning the men's 50m freestyle S7 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Lantz Lamback won the gold with 27.84 seconds. (Xinhua/Yang Shiyao)

Lantz Lamback of the United States celebrates for victory after winning the men's 50m freestyle S7 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Lantz Lamback won the gold with 27.84 seconds. (Xinhua/Yang Shiyao)

Oxana Savchenko of Russia celebrates for victory after winning the women's 100m freestyle S12 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Oxana Savchenko won the gold and created the new world record with 58.41 seconds. (Xinhua/Wu Wei)

Daniel Dias of Brazil celebrates for victory after winning the men's 100m breaststroke SB4 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Daniel Dias won the gold and created the new world record with 1 minute and 32.27 seconds. (Xinhua/Yang Shiyao)

Nataliia Prologaieva of Ukraine celebrates for victory after winning the women's 100m breaststroke SB4 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Nataliia Prologaieva won the gold and created the new world record with 1 minute and 43.99 seconds. (Xinhua/Yang Shiyao)

Daniel Dias of Brazil celebrates for victory after winning the men's 100m breaststroke SB4 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Daniel Dias won the gold and created the new world record with 1 minute and 32.27 seconds. (Xinhua/Yang Shiyao)

Daniel Dias of Brazil competes during the men's 100m breaststroke SB4 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Daniel Dias won the gold and created the new world record with 1 minute and 32.27 seconds. (Xinhua/Yang Shiyao)

Nataliia Prologaieva of Ukraine celebrates for victory after winning the women's 100m breaststroke SB4 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Nataliia Prologaieva won the gold and created the new world record with 1 minute and 43.99 seconds. (Xinhua/Yang Shiyao)

Maksym Veraksa of Ukraine celebrates for victory after winning the men's 100m freestyle S12 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Maksym Veraksa won the gold with 51.40 seconds. (Xinhua/Yang Shiyao)

Maksym Veraksa of Ukraine competes during the men's 100m freestyle S12 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Maksym Veraksa won the gold with 51.40 seconds. (Xinhua/Yang Shiyao)

Maksym Veraksa of Ukraine competes during the men's 100m freestyle S12 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Maksym Veraksa won the gold with 51.40 seconds. (Xinhua/Yang Shiyao)

Oxana Savchenko of Russia celebrates for victory after winning the women's 100m freestyle S12 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Oxana Savchenko won the gold and created the new world record with 58.41 seconds. (Xinhua/Yang Shiyao)

Lantz Lamback of the United States celebrates for victory after winning the men's 50m freestyle S7 final of swimming competition at the London 2012 Paralympic Games in London, Britain, on Sept. 4, 2012. Lantz Lamback won the gold with 27.84 seconds. (Xinhua/Yang Shiyao)