WASHINGTON - JULY 12:  Dr. Robert Lanza, Vice President of Medical and Scientific Development at Advanced Cell Technology, Inc., testified before the Senate Subcommittee on Labor, Health and Human Services, Education and Related Agencies during a hearing on stem cell research July 12, 2005 on Capitol Hill in Washington, DC. The hearing focused on a single cell technique that may be possible without the destruction of an embryo.  (Photo by Chip Somodevilla/Getty Images)