Guatemala's Vice president Rafael Espada talks about medical experiments conducted on Guatemalan citizens over 60 years ago during an interview in in Guatemala City March 15, 2011. Victims of medical experiments conducted by the United States between 1946 and 1948, where patients were intentionally infected with with syphilis in an effort to study the effects of the disease, have recently filed law suits against the U.S government. REUTERS/Daniel LeClair (GUATEMALA - Tags: HEALTH POLITICS)