Members of Vice President's Dick Cheney's staff censored congressional testimony by a top federal official on the health threats posed by global warming, a former Environmental Protection Agency official said today.

In a letter to Sen. Barbara Boxer (D-Calif.), who chairs the Senate Environment and Public Works Committee, former EPA deputy associate administrator Jason K. Burnett said an official from Cheney's office edited out six pages from the testimony of Julie Gerberding, director of the Centers for Disease Control and Prevention, last October.