Politicians make the funniest faces (24 images)

U.S. President Barack Obama addresses the American Nurses Association House of Delegates in Washington on June 16, 2010. President Obama spoke about health care reform legislation that was recently passed. UPI/Brendan Smialowski/Pool

U.S. President George W. Bush dances during a performance by the Kankouran West African Dance Company during an event marking Malaria Awareness Day in the Rose Garden of the White House on April 25, 2007. (UPI Photo/Roger L. Wollenberg)

Angela Merkel, Germany's chancellor, speaks to U.S. President Barack Obama (not pictured) during a bilateral meeting at the Nuclear Security Summit in Washington on April 13, 2010. UPI/Andrew Harrer/Pool

(L to R) International Monetary Fund (IMF) Managing Director Dominique Strauss-Kahn, U.S. Treasury Secretary Tim Geithner, and French Finance Minister Christine Lagarde talk after the G-20 Meeting of Finance Ministers and Central Bank Governors gathered for a group photo during the International Monetary Fund and World Bank Spring Meetings in Washington on April 23, 2010. UPI/Alexis C. Glenn