Britain's Prince Charles arrives to deliver the keynote address on sustainable agriculture, Wednesday, May 4, 2011, at Gaston Hall at Georgetown University in Washington. Georgetown University ... more 
Britain's Prince Charles arrives to deliver the keynote address on sustainable agriculture, Wednesday, May 4, 2011, at Gaston Hall at Georgetown University in Washington. Georgetown University President John J. DeGioia is at right and Chief Executive Officer of The Washington Post Company Donald Graham, is center. less 
1 / 1
Associated Press | Photo By Susan Walsh
Wed, May 4, 2011 10:29 AM EDT