William (Bill) H. Gates III,

co-chair and trustee (center), tours the Chaoyang CDC Clinic in Beijing, China.

Melinda French Gates,

co-chair and trustee (right), talks to students in a biology class at John Hope College Prep High School in Chicago, Ill.

Warren Buffett,

trustee, speaks to foundation staff during a 2007 visit to Seattle, Wash.

William H. Gates Sr.,

co-chair (center), visits students and teachers at Oscar de la Hoya Animo Charter High School in Los Angeles, Calif.

Patty Stonesifer,

chief executive officer (right), visits a crop research center at Patancheru in Andhra Pradesh, India.

Sylvia Mathews Burwell,

president, Global Development Program (center), examines plantain demonstration plots at a research station in Abuja, Nigeria.

Allan C. Golston,

president, U.S. Program (right), talks to Chicago Public Library Commissioner Mary Dempsey at the Humboldt branch in Chicago, Ill.

Tadataka Yamada, M.D.,

president, Global Health Program (blue shirt), talks with a patient and her family at the Janani Surya Franchise clinic in Bihar, India.

Martha Choe,

chief administrative officer (left), sits in on a mobile computer training class in Veracruz, Mexico.

Connie Collingsworth,

general counsel, attends a foundation meeting in Seattle, Wash.

Alexander S. Friedman,

chief financial officer (right), visits the West Gonja District Hospital in West Gonja, Ghana.

Geoff Lamb,

managing director, Public Policy, talks with foundation colleagues in Washington, D.C.

Heidi Sinclair,

chief communications officer, tours Kothapally village in Andhra Pradesh, India.