Dr. Sheik Humar Khan, who died of the disease he was helping to fight, posed for a picture in Kailahun, Sierra Leone, on June 25. Umaru Fofana/Reuters /Landov hide caption
Dr. Sheik Humar Khan Dr. Sheik Humar Khan
Dr. Sheik Humar Khan, who died of the disease he was helping to fight, posed for a picture in Kailahun, Sierra Leone, on June 25. Umaru Fofana/Reuters /Landov hide caption