Beijing 2008 - Games of the XXIX Olympiad - August 8th to the 24th, 2008

The first ever U.S. National Train Day on May 10 was a celebration that may have passed many Americans by. But why create a day to celebrate trains?

Sport's highest court plans to announce Friday whether a Paralympic Games champion nicknamed the "Blade Runner" for his high-tech prosthetic limbs may compete in this summer's Olympic Games.

Renowned astrophysicist Stephen Hawking from the University of Cambridge is accompanied by his assistant during a tree-planting ceremony at the Hong Kong University of Science and Technology in Hong Kong Tuesday, June 13, 2006. The survival of the human race depends on its ability to find new homes elsewhere in the universe because there's an increasing risk that a disaster will destroy th...

BEIJING - FEBRUARY 28: Japan's Yoriko Okamoto (R) competes against Australia's Tina Morgan (L) during the women's under 67kg of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 28, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 28: Japan's Yoriko Okamoto (L) competes against Australia's Tina Morgan (R) during the women's under 67kg of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 28, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: China's Lei Jie (L) who wins the gold medal competes against China's Zhang Hua during the women's under 57kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: Turkey's Servet Tazegul (L) who wins the gold medal competes against Mexico's Erick Osornio during the men's under 68kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: China's Zhu Shengpeng (R) competes against Australia's Daniel Janyckyj(L) during the men's under 68kg of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: China's Zhu Shengpeng (L) competes against Australia's Daniel Janyckyj during the men's under 68kg of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: Brazil's Debora Nunes (L) competes against France's Maeva Musso during the women's under 57kg of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: Turkey's Servet Tazegul (L) who wins the gold medal competes against Mexico's Erick Osornio during the men's under 68kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: Turkey's Servet Tazegul (L) who wins the gold medal competes against Mexico's Erick Osornio during the men's under 68kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: Turkey's Servet Tazegul (R) who wins the gold medal competes against Mexico's Erick Osornio during the men's under 68kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 27: Turkey's Servet Tazegul (R) who wins the gold medal competes against Mexico's Erick Osornio during the men's under 68kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 27, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: USA's Charlotte Craig screams during the women's under 49kg at the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology's Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: Canada's Ivett Gonda (L) competes against USA's Charlotte Craig during the women's under 49kg at the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology's Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: China's Hu Pengxiang (L) competes against Japan's Kengo Uchimura during the men's under 58kg of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: USA's Charlotte Craig (R) competes against Canada's Ivett Gonda during the women's under 49kg at the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology's Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: China's Zhou Zhuohui (R) competes against Philippines' Kathleen Eunice Alora during the women's under 49kg at the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: Spain's Joel Gonzalez (R) who wins the gold medal competes against Philippines' John Paul Lizardo (L) during the men's under 58kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: China's Pei Guangqi (R) competes against Mexico's Rodolfo Osornio (L) during the men's under 58kg of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: Spain's Joel Gonzalez (R) who wins the gold medal competes against Philippines' John Paul Lizardo (L) during the men's under 58kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: China's Wu Jingyu (R) who wins the gold medal competes against Sweden's Hanna Zajc during the women's under 49kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: Spain's Joel Gonzalez (L) who wins the gold medal competes against Philippines' John Paul Lizardo during the men's under 58kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - FEBRUARY 26: China's Wu Jingyu (L) who wins the gold medal competes against Sweden's Hanna Zajc during the women's under 49kg final of the 'Good Luck Beijing' 2008 International Taekwondo Invitational Tournament at the University of Science and Technology Beijing Gymnasium on February 26, 2008 in Beijing, China. (Photo by Feng Li/Getty Images)

A Paralympic gold medal winner will not be allowed to compete in the Beijing Olympics later this year after athletics' governing body ruled that his specially-designed prosthetic limbs gave him an unfair advantage over other runners.

BEIJING, CHINA - NOVEMBER 27: (CHINA OUT) David Ho, leading Chinese-American expert on AIDS and epidemics and Director of the New York-based Aaron Diamond AIDS Research Center, delivers a speech at Tsinghua University on November 27, 2007 in Beijing, China. Ho, who develops the 'Cocktail Therapy', or combination therapy, has pioneered the use of protease inhibitors in treating HIV-infected patient...

BEIJING, CHINA - NOVEMBER 27: (CHINA OUT) David Ho, leading Chinese-American expert on AIDS and epidemics and Director of the New York-based Aaron Diamond AIDS Research Center, smiles during a speech at Tsinghua University on November 27, 2007 in Beijing, China. Ho, who develops the 'Cocktail Therapy', or combination therapy, has pioneered the use of protease inhibitors in treating HIV-infected pa...

BEIJING, CHINA - NOVEMBER 27: (CHINA OUT) David Ho, leading Chinese-American expert on AIDS and epidemics and Director of the New York-based Aaron Diamond AIDS Research Center, delivers a speech at Tsinghua University on November 27, 2007 in Beijing, China. Ho, who develops the 'Cocktail Therapy', or combination therapy, has pioneered the use of protease inhibitors in treating HIV-infected patient...

BEIJING, CHINA - NOVEMBER 27: (CHINA OUT) David Ho, leading Chinese-American expert on AIDS and epidemics and Director of the New York-based Aaron Diamond AIDS Research Center, delivers a speech at Tsinghua University on November 27, 2007 in Beijing, China. Ho, who develops the 'Cocktail Therapy', or combination therapy, has pioneered the use of protease inhibitors in treating HIV-infected patient...