DETROIT - OCTOBER 4: Executive Director of the nonprofit Genetics Policy Institute (GPI) Bernard Siegel addresses the audience at the start of the 2010 World Stem Cell Summit at the Detroit Marriott ... more 
DETROIT - OCTOBER 4: Executive Director of the nonprofit Genetics Policy Institute (GPI) Bernard Siegel addresses the audience at the start of the 2010 World Stem Cell Summit at the Detroit Marriott Renaissance Center October 4, 2010 in Detroit, Michigan. More than 1,200 scientists and researchers from around the world are expected to attend the summit that focuses on the advancement of embryonic stem cell research. (Photo by Bill Pugliano/Getty Images) less 
1 / 20
Getty Images | Photo By Bill Pugliano / Getty Images
Tue, Oct 5, 2010 9:22 AM EDT