U.S. Ambassador to the Unitied Nations Samantha Power (right) listens to Lucy Mandazuto at a community hospital in Bangui, Central African Republic, on Thursday. Mandazuto was wounded in sectarian violence.
Iranian Foreign Minister Mohammad Javad Zarif shakes hands with U.S. Secretary of State John Kerry on Nov. 24 in Geneva, after the announcement of a deal halting parts of Iran's nuclear program.
Fabrice Coffrini/AFP/Getty Images