White House Blacklists 'Liberal' Scientists [40min]

Political interference in science is causing widespread alarm across the United States. Thousands of scientists are accusing the Bush administration of systematically suppressing, manipulating and distorting their work. Many government scientists have resigned in protest, claiming that industrial and ideological powers are infiltrating their work to an unprecedented level. BBC Washington Correspondent Justin Webb investigates the growing number of US science scandals -- from editing climate change research to repressing the sale of contraceptives.