University of Chicago professor Yoichiro Nambu wins Nobel Prize in physics

University of Chicago professor Yoichiro Nambu leaves his house to walk to a news conference after winning the Nobel Prize in physics on October 7, 2008 in Chicago. The Tokyo born American was awarded the prize for discovering a mechanism called spontaneous broken symmetry in subatomic physics and shares the prize with Japanese physicists Makoto Kobayashi and Toshihide Maskawa. (UPI Photo/Brian Kersey)