Ambassadors David Manning, then-British ambassador to the United States, visited his office, and met with People's Republic of China Premier Zhu Rongji in 1999, Costa Rica Presidents José María Figueres and Oscar Arias Sánchez, Canadian Prime Minister Jean Chrétien, Panama's President Martin Torrijos, well as U.S. Presidents Jimmy Carter, George H. W. Bush, Bill Clinton and George W. Bush. He also championed improving school-level physical and health education, the theme of his World Health Day 2006 address before the Panamerican Health Organization in Washington, D.C..