U.S. Secretary of Agriculture Tom Vilsack answers questions from journalists during a press conference of the 20th China and U.S. Joint Commission on Commerce and Trade Thursday Oct. 29, 2009 in Hangzhou, China. AP Photo logo AP Photo 28 months ago

U.S. Secretary of Agriculture Tom Vilsack answers questions from journalists during a press conference of the 20th China and U.S. Joint Commission on Commerce and Trade Thursday Oct. 29, 2009 in Hangzhou, China.