Yoichiro Nambu (R), one of three winners of the 2008 Nobel Prize for physics, laughs with fellow professor Simon Swordy (seated L) and other colleagues during a news conference at the University of Chicago October 7, 2008. Nambu, a Tokyo-born American citizen, and two Japanese scientists shared the 2008 Nobel Prize for physics for discoveries in sub-atomic particles, the prize committee said on Tuesday. REUTERS/John Gress (UNITED STATES)